A procedure very similar to a colonoscopy, but not quite.
Be careful out there.
Or in there.
(I would have left that last line out, but I'm sure that only would have encouraged people to insert their own joke, then make their own jokes about insertion, and I wanted to shoulder all of the responsibility here for this entire atrocity, including additional jokes about the "shoulder" not being the body part in question. See? I let no one else be the butt of any jokes; I take it all on, with this comedy dying for all of your sins.)