Jump on it! The absolute worst that can happen is that the director will have a good laugh and then say, "Next piccolo player!" The best that can happen is that you might get featured on a concert.
(I've never tried it, but I had a friend in HS who did a creditable job of it on his tuba.)
David Bjornstad
1923 Conn New Wonder 86I, Bach 6 1/2 AL
2018 Wessex EP100 Dolce, Denis Wick 4ABL
2013 Jinbao JBEP-1111L, Denis Wick 4AM
2015 Jinbao JBBR-1240, Denis Wick clone mouthpiece of unknown designation
Cullman (AL) Community Band (Euph Section Leader)
Brass Band of Huntsville (2nd Bari)