Tunnel is used to cue a tunnel where the dog has to power in a straight line at the exit.
Chute is used to cue a tunnel with a gradual turn towards the handler.
Check Check and Gee Gee are tunnel cues for tight turns at the exit. Check Check is turn right, Gee Gee is turn left. These cues are used to cue the entire obstacle, not just the exit, and they are different ones from the tight turn cues at the end.
