When you Spackle but after pulling your pants up, you unexpectedly do the same thing, as the spackle would catch you off-guard with a sucker punch
Ron: Dude did I tell you what happened after we had Taco Bell?
Jeremy: Nah man, what happened?
Ron: I had to shit so bad and was in a hurry, so after I spackled, I got spackle sucker punched!
Jeremy: Oh man that sucks!