In the case of an R44 that ditched with two POB, pax got out and stood on the skid ready to jump while in autorotation. Unfortunately he dropped a raft, attached to his waist by a lanyard, and it fell inside the skid - he jumped outside the skid while still high and the force was sufficient to break the lanyard. So not only did the pilot have to cope with the rolling moment of his departure but he had the secondary lurch from the line breaking. Didn't cause any problems.