Chair dives - inexpertly done

This morning I took K to the soft play place in Gladesville. Our mother's group decided against the beach again and went there instead.
K had a riot, running around like a mad thing, climbing on everything and generally having a ball. Which there were plenty of, by the way, she collected them and deposited them in the back of the little push cars dotted around the place. The jumping castle/slide was a riot, and she went down by herself a few times.
Right up until I decided she should have lunch. Grabbed offending infant and plonked her on a chair, told her to sit down while I got her lunch out. She stood up - and the next moment the chair was falling backward, baby K face planted into the floor.
Not nice. She cut her lip and grazed her chin. Unhappy puppy. Blood everywhere, for a wee while.
Gathered her up and plonked bottle in offending oriface, asleep by the time we got home.
Woke up and of course didn't want lunch - her mouth was sore, wasn't it.
We went in to Uni to see Mary Lou, who is very busy, but managed to give us half an hour of her time. She said my research was "very interesting". She'll help assess it in July, she says.
Ducked into Birkenhead on the way home and K scored a new pair of jeans and some pyjamas. I think it's a guilt trip over her getting hurt.

I'm such a guilt ridden softy.