STVs do not reflect the actual in-game interp properly so hitboxes always appear buggy in them. Doesn't actually mean that the sniper shot thin air and got a headshot in-game.

While #2 is correct, shit like this also happens sometimes: http://www.twitch.tv/langeh/c/2210189

wow lange thats crazy and unexplainable good post

it's funnier if you don't explain it

That clearly isn't an STV though, as the killfeed is coming up white.

ping fucks up everything though http://www.youtube.com/watch?v=6TLWeiMvl_U

it is a POV, I wish it was STV, as I could've gotten some better angles for the clip itself, but thought it was pretty funny how large the box is

Lagshots can let you shoot through walls cs style 8)

http://www.youtube.com/watch?v=gHRls7N4VHk

0:55

This is the best, the scout literally has blood on his face. POV demo. He's playing vs SQL (Another Australian team) so pretty sure ping isnt even a factor.

http://i.imgur.com/q16uY.png

melee hitboxes with vast differences in ping is pretty amazing as well

i've tried explaining to people that i can't see when people pull out their melee weapon before they've already hit me once, but i guess the same delay is the same for people that i manage to hit with my melee weapon??

http://www.youtube.com/watch?v=2UwgMDgjPmk#t=42s

it's really weird in-game hearing the flesh hit from hitting someone with your melee weapon, but not hearing a hitsound which brings a sudden realization that you didn't actually hit them

or swinging at air and hearing a hitsound

I have no idea what Lange's highlight was about but both the OP and Sheep's are from the model being in a different place from the hitbox IIRC.

Stabby's video about backstab registration is probably relevant:

http://www.youtube.com/watch?v=DO1hbjr-QGM