the-deadly-cutsman
my favorite sfm/ gmod animation thing

when a character turns their head and you hear bones cracking 

adeptus-sororitas-official

Also really good

Person doesn’t want to animate walking, so they either have the characters slide on the ground while or just fucking fling them into the shot

gensokyododgeman

Other fun ones:
-Sliding along the walls/ceiling when a spot can’t be accessed by walking
-N64 music is constantly lurking around
-When a character slaps another character or object and it goes flying somehow
-Ed Edd and Eddy sound effects