Killer Cellist

I take a quartet of 10-yr-old girls.  The cellist got a larger cello over the holidays, one which is her own (not a school instrument), and when in its case on her back, it protrudes just above her head.  We were dealing in stickers after the rehearsal this morning.

Cello takes the sheet of stickers but drops it.  Her cello is on her back - as she bends down to pick up the stickers, she takes out Violin 1 and Viola.  I look up to see Violin 1 rubbing her forehead, Viola reeling and holding her head.  Cello is horrified by what she's done, apologises, and we all check that everyone is okay. 

Cello hadn't actually picked up the stickers, so she warns everyone: Okay everyone, watch out - I'm going down again.

Incident-free this time, barring all the giggles.

Later, I saw Cello just after her lesson. 

Me: How's the new cello going?
Cello: Good... Except the tuning. 
Me: Your hands will get used to it.
Cello: Well, it's more that the case is a soft case, so if I knock it at all...
Me: Like when taking out the rest of your quartet...?
Cello: Um, yeah.... It just goes out of tune so quickly!