I bet it was her time of the month:

A woman who told authorities she was fed up with tailgaters pulled out a gun and shot at the tires of a pickup that got too close, police said. Officials believe the bullet missed the pickup, and no one was hurt."She said she was tired of people tailgating her," Macomb County Sheriff Mark Hackel said.

Headd, who had a permit to carry a concealed weapon, was charged with assault with a deadly weapon, discharge of a firearm from a vehicle and use of a firearm during a felony.