You all are mean.
But seriously, I'm glad I can provide my share of amusement, even if it is typically unintended.
I think my best screw-up was definitely either the cop claim that Golden mentioned OR when replacing in to the LOST map game on RM hosted by BR and LC when I had BTSC with Typhoony and a few others. I said I was Charlie and I was looking for Claire. Typhoony told me that rumor had it that Dom was Claire. During a subsequent lynch, I then, somehow forgetting that information in the moment because I was making a busy vote, decided to vote for Dom. Typhoony concluded that I must have been lying about my role claim, therefore, especially since he doubted it to begin with, and proceeded to lead a lynch train against me hard. I tried my best to defend against it, but didn't have anything other to say than basically "I fucked up hard". When I flipped civilian, I could just imagine the facepalms happening behind other monitors.
In terms of actual meltdowns, I have to say I still love my Rainbow Sockman/Raider meltdown in The Flash. That one was actually fun.

Most of the rest of my meltdowns were completely NOT fun, but they are funny now, at least. The one Daisy mentioned re: Hedville Idol was pretty classic too. I tunneled Roxy and Cloggy HARD. I couldn't believe it when neither of them was mafia.
With regards to other people's meltdowns, I'm sure there are other good ones that aren't mine, but I can't think of them at the moment.
With regards to funny moments, I do have a few treasured moments when I was hosting that I thought were funny in which the players were like WTF OMG. My top three absolutely have to be (in no particular order):
1) When I exploded 13 players with bombs in Avant-Garde Mafia (the original, hosted on ProgArchives) -- I never expected more than a player or two to say "yes" to those presents after I had tortured all of the players all game with nasty surprises... let alone 13 of them! It was too late for me to alter my mechanic then, plus I figured, when the hell am I going to get to kill 13 players at once ever again?
2) When all hell broke loose in Bioshock after Andrew Ryan (DH) died, and the ADAM Guardians went from being on top of the world to losing 4 of their members in
one Night. This was priceless. I've never seen a mafia team so devastated after one Night's worth of actions before, and would be hard pressed to think I'll ever see it again.
3) When boo (as Rem) killed off the two major civilian obstacles left in their way in Death Note. This was
majestic and a really fun post to write. Then Llama (the third/last civilian obstacle) got lynched right thereafter, thanks to boo's push on him as well.
