Continuity mistake: When Giovanni Jones is holding a singular G note at the concert, his trousers burst and fall down to his feet. But when Bugs Bunny steps outside to order a pair of ear muffs, look at Giovanni and you can see his trousers have disappeared.
Continuity mistake: After Giovanni Jones has performed his first note during the concert's final act, you can see that Bugs Bunny's right hand is flat on his side, but in the next shot his hand is now bent backwards.
Continuity mistake: After Bugs Bunny has finished pouring the liquid alum into the sprayer, you can see the bottle of alum is still on the table but when Giovanni Jones is waiting to go on stage, the bottle is nowhere to be seen.
Continuity mistake: When we first see the concert hall at Giovanni Jones's concert, you can see that there is nothing on the left of the hall, but when Giovanni appears on the stage, a tree in a pot has appeared.