Charging Needler glitch

This can only be done on the Sacrade Icon level. When you find the Jakal and Grunts in the begging of the level, destroy all the sentenils and their ports to stop them from coming out. If the Jakal is charging his plasma pistol after the battle, switch it with a needler. If done right, the needler will fire but no needles will come out. Try it with some other weapons like the carbine or any other weapons you can find.