Boomer

The Boomer is an infected from Left 4 Dead and its sequel, being an extremely bloated zombie that pukes on the survivors.

Features
The Boomer is extremely fragile, as the unstable amount of bile that drowns its body will make it explode if a single bullet hits it. However, the Boomer can be effective, as all common infected will focus on one survivor if the Boomer pukes on them. He can also swipe, but this attack hardly does any damage. When a Boomer does explode/die, a wave of bile coats any nearby survivors, making the Boomer a suicide bomber-like character.

Appearance
The Boomer first appears as an extremely bloated man with clusters of fat tumors littering his plump face. While the Boomer does wear a navy blue T-shirt, it is very small and reveals the Boomer's bulging stomach and swollen, stumby arms. He also has messy black hair, dark grey track pants, and black shoes.

In Left 4 Dead 2, the Boomer looks relatively the same, except his skin is more rough and crisp as if it dried out. Female Boomers also appear, who wear denim shorts, a grey thong, and a matching head of hair.