bungee jumping

I mean, hey, that's what friends are for. You know, keeping you on your toes, and pulling ridiculous little stunts like the one we have here. This poor lad must've been so hopelessly confused the moment that he hit the water. 

If a source of noise is traveling away from you rapidly, the sound waves emitted will be further apart, causing the pitch to sound lower from your perspective. Then when it travels toward you, the sound waves will be bunched closer together and that same sound will be heard at a higher pitch. Also, if the source of that noise is bagpipes, that same noise source will also likely be wearing a kilt.

As usual, our friends at Senor GIF manage to distill all the best in a WIN video into a simple image file: