The Thing

Various glitches

 * Receiving damage while you use a blood test allows you to move (this can be done for example using Flashbang or Flamethrower's fire). Finishing the animation, will teleport you back to a place where animation started.
 * Having an NPC in the corner and then using a syringe while holding backward allows you to clip through a wall. However, when animation finishes, you'll be warped back to a space where you started animation.