A month later after this post, my band teacher actually let me play an octave higher on a solo that I cannot remember now- just an FYI that this is the average school band; a pretty informal setting (in general). Of course, when I made regionals later that month and a year later and eventually all-states 24 hours ago, I got serious (partially because the music was not so easy that I could have so much spare time during the time to "improv")
Also, when I was in a jazz band, a trumpet player brought a literal accordion [an unplanned part] and played a whole entire jig on the accordion; where even the conductor was surprised but pleased during the concert- showing how life's concreteness is never concrete and how nonconformity (at the right moment) is golden.
