Eric Carrier had better hope karma doesn't come after him.

The 23-year-old Hooksett, New Hampshire man turned himself into police Tuesday after he pretended he had a brain injury so a nurse would change his adult diaper.

Authorities claim Carrier posted online ads, posing as a father seeking a nurse to help take care of his son, who he claimed suffered brain injuries in a car crash.

When one nurse arrived at Carrier's home in March, under the assumption she would be introduced to her patient, the father in question was not there and Carrier acted like he was handicapped.

The nurse, trying to be a good soldier and thinking the father wasn’t around, didn't want to leave Carrier with a soiled diaper, so she changed him.

At some point, Carrier exposed himself to the nurse, which caught her by surprise. No one ever called her back for a future appointment, so she called police, who did some investigating and got to the bottom of the mystery.

We don't know why he pretended to have a brain injury. It sure sounds like he's not capable of properly using his noggin.