Buck up!

[rebbonk]

The orchestra conductor was laying into the second violin: 'If you don't buck up your ideas and demonstrate to me that you are worthy of being called a musician, I'll take away your violin and your bow, give you two drumsticks, and move you to the percussion section.'

The drummer then chimed in with: 'Yeah, and if you can't play the drums,

Spoiler:

we'll take away one of your sticks and make you the conductor!'