Telemann's Gulliver Suite for Two Violins:

Some of Telemann's musical allusions to the stories are more visible on the page than audible in the music. The Chaconne, a noble dance in 3/4 time, is here performed by the diminutive Lilliputians in 3/32 time in which 128th notes abound. Similarly, the giants of Brobdingnag dance a sprightly Gigue not in 12/8 time but in 24/1 where the sortest value is a whole note.

Regrettably, the first sentence of the quote above happens to be true: you'd never guess from listening (audio samples can be had on the Amazon page). What an odd way for a composer to divert himself. Telemann, whom I often find enormously boring, could occasionally be a pretty odd duck, though. His opera Orpheus is one of the damnedest baroque operas I've come across. It's numbers jump around between German, French and Italian language more or less at random, and there are some really unusual percussion passages in the last act when Orpheus falls afoul of the Bacchantes.