On any map with a Mantis, if I can get within an approachable range I can take that damn thing out myself so long as all three grenades connect. Without Explosives, I can't seem to be able to reliably kill a Mantis with 3 Plasma Grenades. =/
Sony bought Konami and will release a DDR game for the Nintendo DS. In this game, you set your DS on the floor and stomp on it till it no longer functions.