Azir's Ultimate Gitch
When playing as certain characters who can cross terrain using abilities, using them to pass over the terrain created by Azir's ultimate (the wall of soldiers), the ability will knock you back and damage you as if it had just been cast on you. This does not always seem to happen to characters with teleports, but as an example, while playing as Vi, if you try to "vault breaker" through it you'll be bounced back and damaged as you start to pass through.