An entity which when collided with a welded selection of objects unwelds them and changes all their colours so they're rainbow.
If it touches a player they turn a bright colour, die, and catch alight. The HUD then proudly announces that "[username] is gay!!".

garrysmod.org/downloads/?a=view&id=23076

Combine this with the weldball for extra fun. Mingeblok a creation, then weld all the components together randomly.
( Ttssattsr MILA KUNIS IS MINE., Thu 6 Mar 2008, 16:55, archived)

ahh looks like fun heh
for no reason here is an assortment of gman gurns


(maninthespoon is finally working on another gmod movie! slowly.., Thu 6 Mar 2008, 17:05, archived)

roflcakes
XDDD
(taids2 punched himself in the balls on, Thu 6 Mar 2008, 17:17, archived)