I stopped to help a woman and her daughter. The woman's jumper has got wrapped around her cassette, chain, mech. What a mess! Nothing logical and sensible would shift it.
I ended up cutting it off and slicing open the ball of my thumb in the process. I patched up my hand with some paper towels and some gaffer tape (wrapped around the barrel of my mini-pump). It took weeks to heal. But at least she said thank you!