Your doctor may use a pneumatic otoscope, which has a plastic bulb on the end, to blow a small puff of air against your eardrum. Normally, this air will cause your eardrum to move.

By the same token, there's no real reason the above, seemingly mundane clip of Pat LaFontaine at the doctor should have over 580,000 views on YouTube, which is 520,000 more views than any video of ...