2 questions in here. I simply cannot figure out the problem. Is it just how the script works?

pick = math.random(1,5)

Brick = game.workspace.Part



if pick == 1 then
game.workspace.Part.Size = Vector3.new(3,3,3)
end
if pick == 2 then
game.workspace.Part.Size = Vector3.new(2,2,2)
end
if pick == 3 then
game.workspace.Part.Size = Vector3.new(1,1,1)
end
if pick == 4 then
game.workspace.Part.Size = Vector3.new(5,5,5)
end
if pick == 5 then
game.workspace.Part.Size = Vector3.new(6,6,6)
end

#2.) Every time i make a weapon and select it, i sometimes go upside down or in another weird, awkward position and then fall down. Does it have to do with my handle?