The boomer is a zombie, of which explodes, As it's name says, If you get close to it, It will explode, Or; If you kill it- Then it'll explode too.
How to kill itEdit
Any weapon is great to kill it; Preferrably a Pistol or Semi auto gun
But. Do NOT. And we mean do NOT! approach it with a melee weapon, Only a crazy player would do that, And they would probably die, aswell