Grenades the bane of all aliens and noobs who activate it the moment they get it. How ever I sawa recent example of a good idea. A human player bought a painsaw, grenade, and armor. Then ran and attacked the alien base. 10 or so dretchs star doing a little dance around hmm when boom. He activated his grenade abd took humans strait the stage 3. Aliens got pwn. THis also backs up there respawn line 2 if you kill eniugh.