In yet another glitch on Wayne Manor, a combination of me on bike and being hit, or me hitting the other guy on the bike resulted in the bike speeding off screen. Instead of seeing blank space, like mentioned above, the bike would pop back on screen and run me over, with the other character riding it! Before this would happen the other character could still move around and play, but when the bike came back he hopped back on.
When the point is to knock people out of interactables as punishment for telegraphed usage, this glitch is really bad and will happen plenty of times.