Hint
The move equalizes the position.
Bigger hint
It's a seemingly crazy move.
Answer
44...be3!!
NikoTheodorou vs. royalfork56 | Analysis
It was a speed chess game that I just watched live. My brain told me black was toast but the eval bar said the position was equal. I couldn't believe it.
Black only had 11s and he must have decided it was hopeless so he resigned.
A ring o ring o roses.
A pocketful of posies
A-tissue, A-tissue.
We all fall down.