Don't know if it's possible without diving too deep into the game's code ...
I'd like to start ALL moves intentionally my character can obviously perform when called for by the engine.
That being: KNEEL / CROUCH (happens when e.g. picking something up)
LIE DOWN (happens when toppled over by enemy)
WIGGLE (when e.g. thrown to the ground by a wolf and then grabbed/bitten
or different wiggle when grabbed while standing)
and so on ... meaning there's probably more which I can't think of at the moment ...
I'd like to start such moves on purpose by hitting just another key.
I'm an old fashioned PC-user, you see.