A 28-year-old man was arrested after his Breathalyzer results were too high for the machine to register.

Levi Carter allegedly crashed his car into a street sign and could barely stand when police arrived on the scene.

Officers administered a Breathalyzer, and on the first blow, Carter registered a .467 blood-alcohol level -- six times the legal limit and in the lethal range.

The second time Carter blew into the machine, it could not register a reading -- the screen simply read "HI."

For an average-sized male to have a blood-alcohol level in that range, he would have to drink approximately 20 drinks in an hour.

Carter was arrested for drunk driving.

Read more: ABC 9

Photo credit: Iowa City Police Department