Recently I tried to unscrew the left pedal of a bicycle by turning it counter-clockwise with a spanner lengthened with a piece of pipe. The net result is the spanner broke apart and the pedal is still there.
This makes me wonder.
Is that just threaded joint or is there something else besides threading? Is the threading left-handed or right handed? Do I need anything else except what I would normally use to unscrew a threaded joint?