I don’t think (correct me if I’m wrong) that TP can interact with Dynamics. Dynamics takes things from the first frame it’s activated and runs from there if you added stuff later if would be a problem – perhaps it could be written to do that but not at the moment… You’d need to do it the way they did in the TV studio, have a bunch of balloons in the rafters, nothing needs to hold them they’ll just hang there until you tell the Solver to start.