Fake Blood Bomb

My idea calls for bombs and grenades to be loaded up with fake blood (or chicken blood). Bomb goes off in the midst of enemies, they see more blood than they were expecting and think their comrades (and perhaps even themselves) are more wounded than they really are. They'll think allies which are simply unconscious are dead. They'll see a shallow flesh wound from a piece of shrapnel and, seeing a disproportionate (sp?) ammount of blood, think they're surely bleeding to death from a severed artery or something. This should have them fleeing and surrendering (and at least in some cases getting sick) all over the battlefield.