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UFC weigh-ins are used to hype mega-fights with snarling head-to-heads - but sometimes they go embarrassingly wrong for one of the fighters involved.
From weight fails to woeful PR stunts to - yes - full-frontal nudity, there's many ways they can go amiss. The fine people at Watch MMA have put together a video of the worst, featuring some of the biggest stars of the sport.
10. Kelvin Gastelum
Missing weight can happen, but missing it by a whopping 10lb takes real skill. Gastelum actually seemed to suck in his gut as he weighed in before UFC 183 - but weirdly this did not fool the scales.
Kevin had to hand over 30% of his fight fee to Tyrone Woodley after he came in at 180lb for their 170lb contest. Then he lost a dull decision on fight night. A big fat fail of a weekend.
9. Ion Cutelaba
The Moldovan Hulk wanted to live up to his nickname before UFC Fight Night 96 - so naturally he disguised himself as a nerdy scientist and exposed himself to dangerous levels of gamma radiation.
Or he painted himself green (even his hair), ripped his T-shirt open and leered a Hulk snarl at opponent Jonathan Wilson. Less cool when you think about how long he spent scrubbing himself in the shower afterwards. At least Hulk smashed a win (by, erm, points decision).
8. Dana White
Not an official weigh-in, but Jon Jones and Anthony 'Rumble' Johnson brilliantly pranked their boss at this UFC 187 promo show. The suited pair butted heads, then apparently went for one another, as a flustered White leapt in to try to keep the peace (and not give away a fight for free).
Both fighters then burst into laughter as White looked like he'd left half his body-weight in his underpants.
7. Anderson Silva and Chris Weidman
We don't think 'The Spider' and the 'All-American' wanted to lock lips when they went head-to-head before UFC 162 - but when neither middleweight would back down the only manly solution was to press their mouths together and hope for the best.
Weidman would go on to cause a shock upset by stopping Silva, who was possibly still daydreaming about that pre-fight smooch.
6. Tim Sylvia
Yikes. The former UFC heavyweight champ was a formidable fighter in his prime, but after conquering the division he clearly decided to conquer his takeaway menu.
Mission accomplished! There's no one, specific Sylvia moment - but in 2010, the American weighed in at 305lb and had taken to hitting the scales fully clothed. We feel your pain, Tim.
5. Leonardo Leleco
Coming out in a Scream mask, in the year of our lord 2016, isn't in any way scary. But waiting until you've weighed in, showing your perfectly ordinary face, then slipping on a Scream mask is even less terrifying.
Totally unpetrified opponent Antonio Carlos Junior just stared blankly at Leonardo Leleco then won by submission the following evening. Horrible.
4. Conor McGregor
'The Notorious' makes this list not for any typical controversy but because of how weirdly gaunt and wretched he looks when he's brutally boiled his body down to 145lb.
True, if not really too humiliating, even for a man who prides himself on looking as razor sharp as McGregor. Certainly nothing on his bus attack antics at that UFC 223 media day.
3. Yoel Romero
Missing weight widely is embarrassing - but failing by just 0.2lb is even more agonising. Romero weighed in at 186lb for the middleweight championship bout, had two hours to lose the extra pound - but couldn't quite make it.
Even a clean shave or taking off his socks would probably have done it. Instead, Yoel missed weight by a tiny margin, got docked 30% of his purse, lost the fight - and couldn't even claim his Fight of the Night bonus thanks to his weigh-in fail. Ouch.
2. Travis Lutter
When Joe Rogan himself calls it the world's worst weight cut, we all listen and nod. Before his fight vs Anderson Silva at UFC 67, Lutter missed weight twice - despite stripping off - and saw his dream middleweight championship fight turned into a three-round non-title fight.
The drained Travis didn't make it past the second round and his career pretty much tanked afterwards. That's one bad weigh-in.
1. Max Holloway
It's not only that Holloway looked painfully skeletal before his featherweight title rematch with Jose Aldo - nor that he had to strip nude to make 145lb. It's more that the two chumps holding the banner (upside down) to protect his modesty managed to lift it over the scale - exposing Max's junk to the assembled reporters, photographers, TV cameras and basically the world.
Holloway looks suitably confused, humiliated and just plain zoned out as he stands there, naked as a newborn. At least he won the fight - because he definitely didn't win the weigh-in.
See the full video below - then let us know your thoughts in the comments.