Take stock. I was digging this garden trench. My digger started to tip over, I leapt out to push it upright but ended up face down in the mud with the roll-bar of the digger on my back. No one could hear my screams.
So I'm going to try using my hands to dig beneath me, then slide out myself out. The danger is that the ground will collapse and the digger will push me down into the mud. If you hear nothing more from me, I've drowned.