That does not sound like a trombone! I am a trombone player at my school band, and for your information when you go to the high notes it sounds too shrill. I should know! And the low notes arent low enough. It felt annoying to hear this!
High regester from a mid C to a high C, sounds like a bone, small vibrato, sounds good needs more notes and a wider range. To all people who think it's too high are 2nd and 3rd year bones newsflash to the people who think it's too high MOST PROFESSIONAL AND HIGHER LEVEL TROMBONIST PLAY PRETTY HIGH OF THE BAR LINES
Horrible Should name it trumpet, I play trombone and that does not sound like it
Trombone? Trumpet sounds... Really?
Timing is - get help putting the final nail in your joke's coffin - everything.