How do you make a part fall (using Cframe) on touch?
Unless you want to make a part jsut go straight down without moving in any way whatsoever except down, remainly perfectly flat, anchored, and looking really really really stupid, you don't.
If you INSIST then here is code that will use CFrame to make it "fall"
local part = script.Parent part.Touched:connect(function() for i = 1, 20 do -- go 20 studs. part.CFrame = part.CFrame - Vector3.new(0,1,0) wait(0.01) end end)