My middle finger was caught in that same spot about 2 1/2 months ago, it sucked.
I was holding the bottom of the heel piece and it engaged. It hurt, but then when I went to pull my hand out it was stuck. I tried to push the heel back down but the curved part on the bottom pushed the finger down even harder...could not slide the hand to the side either.
"goddammit, you have got to be kidding me" I shouted.
I had to walk outside from my basement to the barn with a ski stuck to my finger to find my pops so that he could use a beefy screwdriver to push to the side and pry up so that I could get my finger out.
was trapped for maybe 5 mins
Fucked my nail up and the tip of the finger was numb for a few weeks.
The new nail is now starting to grow underneath and feeling is fine.
Be careful out there