When either the back or front truck catches on an obstacle, usually causing a fall.

In skateboarding, where the back or front truck gets stuck on an obstacle

an obstacle that arrests the gravitational collapse

originally replacing the receiver on its cradle; clear

This term means to disconnect the telephone circuit by depressing the receiver key (for at least a default time of 0.8 seconds).

put a telephone receiver back in its cradle

A personality quirk resulting from something bothersome that makes your life miserable. "She ignored me! She must be all hung up about something."

"Hang Up" is a song performed by Andy Abraham from his debut album The Impossible Dream. "Hang Up" was released as Abraham's first single on 27 March 2006 and reached #63 in the UK singles chart, and #14 in Ireland.

cause to be hanging or suspended; "Hang that picture on the wall"

ring off