It's like when you see somebody riding a bike in the street and someone in a parked car opens their door. The biker slams into the now open door and goes flying. The bike gets run over by a moving car behind the biker, the biker gets all kinds of fucked up, but their starbucks coffee(w/ lid of course) doesn't spill a drop and lands right side up.
You can't help but laugh.
Btw true story. Seen that while I was on a date down center city phila.