The player appears to shiver if in a minecart with a lot of other minecarts occupying the same space

The bug

The player's shoulders shake aggressively if in a minecart with a lot of other minecarts occupying the same space.

Steps to reproduce

1. Place a bunch of minecarts on one rail
2. Get in one of the minecarts
3. Go in front-view third-person mode
4. Move your screen around at different angles until the player's shoulders start to shake without your control.