The best way to simulate this would be adding on a whole new simulation on here. If a weight simulator was implemented, then reactions could take place depending on the amount of "weight" that is pushing on the item in question. Weight simulation would also make way for a lot more creations due to what different things weigh. Another thing a weight simulator would be good for is if there was the element of weight involved, there could be a way to program pressure to be added at certain weights without that pressure causing flying particles or explosions. Of course, something like this would be pretty involved as far as coding into TPT and would probably cause a bit of lag due to the amount of processing that would have to be involved.