The drugs and financial stress was apparently making Grillo act erratically.

Still, there is anecdotal evidence among pilots that the rudders can act erratically.

Bob could act erratically, but for Karr every second counted.

I've been having disturbing dreams, and my niece is acting erratically and has spent a lot of time with the Book.

Ryan starts acting erratically, and it is revealed that he is under the influence of drugs.

Neighbors said Ms. Thomas, 62, had been taking medication and sometimes acted erratically.

Officers said he acted erratically and that he, "appeared to be under the influence of something."

Linda has taken to hiding behind a curtain in bed all day long, snapping orders and acting erratically.

These can get dirty, which causes the device to act erratically.

They marry on May 7, but Virginia acts erratically again.