Make sure, if you have the rigging knife on a lanyard, that the lanyard is long enough that you could cut a line over your head if necessary, and that the lanyard isn't going to get snagged on anything. Normally, instead of a long lanyard, I put a short lanyard—for use as a wrist strap—on the knife.
I agree w/ the short. 2' of line (doubled) swinging around seems to get caught on everything in a boat.
Very sad story indeed.