Most of these plans involved one of the offenders calling someone over, while another hit the unsuspecting person on the head from behind.
You wanted unsuspecting persons to be gone, lest they be called as witnesses.
Joe Mack had no desire to accidentally injure some unsuspecting person.
Only once did an unsuspecting person get the answer wrong and lose the prize.
Woe to the unsuspecting person who buys a property on the wrong side of town.
When an unsuspecting person picks up the mirror, the insults automatically start to fly.
Works best with a large group of people and an unsuspecting person (e.g. the principal at graduation, when he made a speech).
The other variant is where a prank is played on an unsuspecting person.
There have been times when someone comes unglued and pushes an unsuspecting person onto the tracks.
They are trying to use the same method of getting free publicity, probably harming some unsuspecting persons along the way.