Funniest and most effective Spy trick yet?

[Allegro]

The version that's practiced on the 2Fort server I used to play on:

Spy sneaks into other base, up to sniper deck, lays down sprays. Inevitably, someone stops to look at them. They get sniped.  

[kikinak]

damnit i got the xbox 360 version so i cant do that. stupid xbox version doesn't have half the maps, no hats, no picture thingies, no upgradable weapons, no bow and arrow, creating maps, no gmod, no patches... i need pc orange box scream  

[Allegro]

PC TF2 doesn't have G Mod either. Neither does the orange box.  

[Thanatoast Crunch]

HAH! That's so great. I can't believe so many people actually stop and stare for so long.