In one of the SG-1 episodes, the gang is stuck in some kind of underground jail where the captors just throw people and food through the gate. There’s no DHD on the jail side. So some of the prisoners try to escape by going into the wormhole but it’s the wrong way. Some also let themselves get swallowed by the woosh.

Gang escapes by using some mcguffin electric tree roots and manually dialing the gate.