I'm curious how others treat this from a timing perspective. I tend to allow the fallen player a brief amount of time to get up, if they make an immediate attempt to stand up, I will expect others to delay kicking at ball in that period. Any delay for advantage and I will call PIADM. I do this because I don't perceive it to be an offense to fall down, even if it is in the unfortunate position over top the ball.
@Russell Jones and others, do you do do the same or do you more or less immediately call to prevent someone from attempting to kick at ball underneath player? I've second-guessed my approach before and wanted to see what others do.