Several players have observed peculiar effects while playing low notes and watching their computer monitors. This happens when the frequency at which your head shakes (as a result of playing the horn) is slightly different from the frequency at which the monitor flashes pictures on the screen. You can also observe the same effect if you use an electric toothbrush during an earthquake; if you audition on the low horn passages in Shostakovich's 5th Symphony while undergoing dental drilling; or if you use an electric razor while sitting on a whoopee cushion.
The effect can be greatly amplified if you do all of these things at once. (WARNING: This is VERY DANGEROUS. Do NOT TRY IT YOURSELF unless you are a PROFESSIONAL STUNT HORNIST.)
Gotta go, E C G H A A E T B B
Rick Stevenson proposes that we can induce magic waves on our compute screens by chewing hard candy. Really, if he had been paying ANY attention, he would have realized that Oreo cookies are even more efficient for this purpose. In addition, if you split an Oreo and place each half in a floppy disk drive, you will observe even more remarkable Magic Wave effects. With the added benefit that you are not running the risk of tooth decay, or interfering with your practicing schedule.
I'm packing up my Oreos and mes petits choux for the drive north to Eugene. (Perhaps the plural is Oreoeaux.)
Gotta go,
Cabbage