Just before my DAS, sat outside the local dealership, as the other lad had gone before me. I was just perched there on the bike, waiting for the instructor to come back & take me for DAS.
I got to thinking "Hmm, I had a little trouble getting this ER5 up on the centre stand before, best practice it before the test just to make sure I've nailed it properly."
So there I am, holding the bike up, centre stand down, rock it, yup, seems secure. Hoik (technical term) the bike backwards & bugger it's got away from me.
Bike falls on its side, away from me

Me in high vis with the riding schools name plastered all over it, and a face that's even more high vis!
Pick the bike back up again & decide to not try that again.
Luckily the examiner didn't ask me to either!