Haha!
Just saw this thread, must share my experience.
Recently half a dozen of us ladies were on a ride.
We parked up for the coffee stop, two bikes got entangled somehow, on moving off again one chain had come off.
I was ready to don my plastic gloves, when the owner of the bike said, no, please, I must use this tool I got as stocking filler - it was the op's hook.
I went uhmmm, of course .... the result was that the tool got stuck in the chain
We had a chain stuck in the front derailleur, and now a hook stack in the chain
I put my gloves on, broke the hook easily from the chain (it's plastic!), moved the front derailleur to middle, turned the back wheel, et voila', back in motion.
I told the lady to ask for her money back as this tool is poo (statement backed by pictures we took), she messaged me later telling me she got a full refund.