I picked this word just because it drips awesome. I dare you to use this in conversation today. Do it!
autoschediastical - [aw-toh-SKEE-dee-az-tik-uhl] - adjective
Something improvised or extemporized.
I can't listen to "Bring It On" by Seal without being transported back to my college Modern Dance final, when I ran out of time to prepare and had to dance an autoschediastical final to that song, and just about died from stage fright while doing it.