I'm Imagining Someone Trying This On Bruce I Just Know It's Either Hal (malicious) Or Arthur (egged On By Someone) Or Diana - Tumblr Posts

Dick spent so much time climbing, hanging off things, or solving problems upside down that it became a joke with the Titans that Robins think better like that. Fast forward a couple of years and Jason threatens to shoot the next person who flips him upside down when he's scheming (Artemis gets Bizarro to do it). Tim nearly kicks Kon in the face for flipping him over. Kara does it when Stephanie's being annoying, but mercifully by the time Damian's there, no one does it to him. Still, occasionally one of the Bats will be upside down because they got caught like that or fell through a vent and have a Eureka moment and everyone will feel vindicated and it starts up all over again.