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.

Tactics
You'll be alerted to this guy by it's obese breathing. Sounding like a fat man who jogged a couple feet, its easy to hear it coming. Shoot at from at least 25 feet away. The bile explosion radius is big and will most likely hit you. Try not to kill it if any allies are close to it too. When it does die, expect 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.