No you're reading it wrong. Op wasn't saying imagine like you are imagining yourself sexually assaulting someone and getting your ass beat. They're just saying it like to imagine the comical situation where some idiot is sexually assaulting someone and then a whole ass family shows up and kicks their ass.
Here's a better more generic example.
Imagine talking shit in a video game and then losing.
Hope this clears it up
I just need a picture of a god danged hot dog