When viewing the player in a minecart from third person view (F5), the player's body and legs will turn from one side to the other depending on the position of the camera. The player's legs will snap from one side to the other and never face forwards.

To reproduce:

• Sit in a minecart
• Press F5 to display third-person view
• Turn the camera - the player's legs will snap from one side to the other