Can you answer this riddle for me?!

Can you answer this riddle for me?

A man in uniform was running home. Suddenly he saw a second man wearing a mask and holding a dread object. He quickly turned around and ran back to where he had come from. What familiar event was occurring?

3 weeks ago
dread= Causing terror or fear

Baseball

A base runner tried to steal home (or was just rounding third base) and the catcher had the ball so he turned around and ran back to third base