Part not falling through terrain why is this happening?

Hi, I recently made a script that makes an explosion wherever you click and I put a part on the top of the terrain when the terrain was fully exploded the part was still sitting on the top of where the terrain used to be. Here is my script:

local player = game.Players.LocalPlayer local mouse = player:GetMouse()

local part = Instance.new("Part") -- You can just change this to part.Parent like you were doing before. part.Parent = workspace part.Anchored = true mouse.TargetFilter = part -- The mouse will ignore the part so it doesn't end up above the mouse position

mouse.Button1Down:connect(function() part.Position = mouse.Hit.p local ex = Instance.new("Explosion") ex.Parent = workspace ex.Position = part.Position-- mouse.Hit.p is a Vector3 already -- mouse.HIt.p is equivalent to Vector3.new(mouse.Hit.p.X,mouse.Hit.p.Y,mouse.Hit.p.Z) end)