Hitchhiking

Hitchhiking is when someone stands on the side of a road and points their thumb in the direct they are traveling, in the hopes that someone in an automobile passing in that direction will pick them up and give them a ride to wherever it is they are going.

The activity is usually looked at in a negative light, due to the fact that people that pick up hitchhikers are strangers, and they could be dangerous people.

Robin referred to the incident in which mushroom spores from Krypton took a ride on a Kryptonite meteor as "Operation Hitchhiker."

External Link

 * Hitchhiking at Wikipedia