How do you make a model fall apart without breaking the welds?

How do i make a model fall (like when you use breakjoints()) but make it stay as one whole model and not have parts fly everywhere?

Make a Script inside the model, ensure the model has a PrimaryPart,

make sure you have all parts of the model have a weld to the PrimaryPart of the model,

ensure that everything except the PrimaryPart of the model is unanchored for the script to work

wait()
script.Parent.PrimaryPart.Anchored = false