Banjo-Tooie Glitch - Spiral Mountain Waterfall Softlock

If you shoot a clockwork into the loading zone of Inside the Waterfall in Spiral Mountain as you collide with it, once the clockwork explodes and you return back, the game will send you to Spiral Mountain in a softlocked state. This is because the water stream pushes you into the loading zone as you shoot the clockwork, causing yout to collide with the loading zone when you return and causing a softlock.

This also occurs in Hailfire Peaks when you shoot a clockwork while sliding into the loading zone on icy ground. This is well documented but the Spiral Mountain one is not as it uses a different method which uses the water.

This was patched in the Australian version of the game and subsequent versions such as Xbox.