There are two ways to use Biobomb. Heller can grab a humanoid target such as soldiers, scientist, civilians, or walkers, implant the Biobomb, then proceed to throw or kick the victim at a specific point. Acting as a sort of "Bio-grenade", the target "detonates" resulting in the deaths and incapacitation of any near-by enemies. Another way is stealth Biobombing. The target will first scream in pain, effectively drawing attention of any nearby human; then detonate, creating a big mess that occupies nearby military units for long. None of the explosion will damage Heller himself, regardless of how close he is to the center.