Teleporting a player into a vehicle while he deploying a rifle causes a weird glitch and may break the game.
When teleported to a vehicle, the player won't sit as usual, and after getting out the player still deploying at the position where he deploys.
Also, further between the position where he deploys and the vehicle, will cause an invisible glitch. The player can't see from some aspect and also can't shoot at all.
It's easy to reproduce on some cutscenes.
Not tested on Multiplayer.