People Holding Instruments Wrong

Once again, even if you're left handed...

Tombones are rarely played left-handed. Even if they were her right index finger should be on the mouthpiece receiver.

He sounded pretty great, actually. However, the right thumb should be between the first and second valve cylinders.

That’s not how you do that either. Left and is all wrong. Can’t slide out the third valve slide with that hand left hand position.

Wrists are very bent. That’s not how you do that.