In theory, we should all treat each other with kindness and the knowledge that we never know the depths of what someone else is going through.
In reality, people bonk heads, test each other's limits, and make quick assumptions about how others will react to small (and large) gestures of disrespect. While it's easy to feel like the world is run by bullies, constantly poking at the patience and exhaustion of those doing their best, there are times when the nice guy snaps, and a hell of karma is unleashed.
In a popular Ask Reddit thread, people shared the most extreme "you just messed with the wrong person" moment they've witnessed, and it's yet another reminder that you can't judge someone based on looks.
1. From Neiliobob:
Stopped in Reno overnight while moving across the country. Had everything I own in a little beater I bought for the trip. All night I'm keeping an eye on the parking lot. There is a cop car in the lot. Sure enough late that night I see a shady guy slowly walking along the line of parked cars scoping them out. To my surprise he decides the COP car is the one he wants to break into.