Chestburster

Sooner of Later it's Gann burst out of your Ribcage and You Just Die

Elise Senior explaining the Chestburster Inside Colby

Dan vs Alien
A Chestburster is Seen Emerging from a Coccounded Don and Burned by Private Drake's Flamethrower and Died. A Couple of Chestburster are Seen Near The Acheron Queen hanging around her for Protection

Dan vs Aliens
Elise Senior Figured out a Chestburster is Inside Colby the Whole Time, Then