The Incredible Hulk #154

Hulk breaks into Ant-Man's lab and starts drinking stuff to try and shrink himself to subatomic size. Chameleon, who is stealing some papers from the lab, takes advantage of the rapidly shrinking Hulk and brings the pint-sized hero back to his current employers, Hydra. Hulk escapes into the air ducts but Hydra sends in a group of plague carrying rats to finish him off. Ant-Man arrives to help Hulk out but is unable to prevent the jade giant from shrinking out of sight. Meanwhile, Betty leaves Project Greenskin to get her life together.