Infected Nade

To do this glitch, toss a frag right before you get infected by another player. If you timed it right, you will be able to kill your opponent with a frag as an Infected.

How it works
You toss a nade, and it's set as an "ally nade" (nade that doesn't hurt your allies). When you get turned, it switches the nade so that it's an "enemy nade" (nade that can kill your enemies)