Originally Posted by ralfp

An acquaintance of mine was among the group in this video (not one of the people playing though). Given that said individual always carries the instrument in question (string, smaller than a cello) on board, I'd stay a harmonica would not be a problem... however...



Please, NO! (Unless you're very good).

Originally Posted by Gamecock

I'm sure a harmonica will be fine as far as the airline is concerned.

Now your fellow passengers may not be amused if you break it out midflight.