Well since we're talking about nothing here being considered TOO devious...how about a weight placed on his chest too, to make it tougher to hold the position? Maybe 5-10 lbs? Or we could go with something more lightweight...but more challenging in another way. Maybe some marbles strategically placed on his chest, with a few metal pans underneath him, and in addition to the motion sensing e-stim...my sound activated e-stim box too? So movement and sound both activate electro...and it could also be pretty entertaining if he feels a marble starting to roll to the edge of his chest, and he tries to move to compensate for it, only to be met with a shock from the movement. But with two e-stim boxes, reacting to sound AND movement...which should send a shock to his cock (and/or balls?), and which should send a shock to the electro plug in his ass? Thoughts?