I had a buttock clenching moment on Dartmoor on a heavily laden BMW 1150 GS. Satnav got me onto a steep gravel laden hill and met an elderly lady in a Morris Minor coming up. No room to pass, my ABS kicked in and I just kept on down the hill. The old sweety popped the car in reverse and down the hill she went pretty smartish! Taught me a lesson about relying on satnavs, ABS and elderly ladies!