The Boomer



The Boomer is a hugely obese Infected that can projectile vomit at the Survivors, blinding them and attracting the Horde to them. When Boomers die they blow up, creating large amounts of gore and viscera, this also attracts NPC infected to the area in which the Boomer exploded. Boomers can also drop from tall buildings into/onto a group of survivors, and once they impact on the streets, they "pop" exploding in the aforementioned manner having the same effect as the vomit attack, this skill could serve as an effective method for ambushing the survivors. As of recent game play changes, the Boomer no longer damages when detonated by neither gunfire nor falling, but hinders survivors' sight and attracts large amounts of the infected horde. Like most other boss infected, a melee hit from the Boomer will do about 2 times the damage as a normal infected.

Tactics
You'll be alerted to the boomer by its heavy breathing and a music cue. Shoot at from at least 25 feet away. The bile explosion radius is large and can blind and attract the Horde. Refrain from shooting when the Boomer is in close vicinity to the rest of the group. When it explodes, prepare for a massive horde to descend upon your group. If blinded, back into a corner or hallway and swat back repeatedly (so you don't shoot allies) and wait for the bile to clear up a little.