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When you are playing Skirmish or online, your gonna get killed a lot, so here's a tip to take someone down with you when your killed. Pull out a grenade (only works on the grenades) and hold R so you will be prepared to throw it. While holding R press press L and you will take out the pin out. Now just go by anyone who you want to kill and eventually the grenade will explode and everyone around you will be killed. This comes in handy when your surrounded and you know you'll die.
Submitted by Joey The Great!!!