Ahh, I see. The red bungee means he can't drop the weight to any effect. Ingenious.
Perhaps the green bungee is there to stop him moving his upper body forward or up in any way, is it attached to his collar - can't see if he's wearing one yet. This is because I presume shuffling forward on his back or moving his upper body would be the only way he could get relief. This one's hard to fathom exactly.