The Infected:(The Boomer)

[DeathStroke]

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The Boomer is a Special Infected that vomits a special bile at Survivors, which temporarily blinds them and draws Common Infected to them. At a distance the Boomer isn't much of a threat; his large size and low health make him an easy target against any weapon at mid or long range. However, if within range he can vomit on Survivors, attracting the Horde. When he dies, he explodes, covering any Survivors who are close enough with bile, blinding them and causing them to stumble backwards. The Boomer is notorious on the Expert difficulty for being able to snipe Survivors. Boomers can be anticipated because of the near-constant gurgling they make. In Left 4 Dead 2, there is also a female Boomer, although the gender has no effect on gameplay.