Three friends of mine came round today - we al have DD's of almost the same age (17-19months). One of my friends is a bit, well, not over-protective, maybe a bit precious (her DD is always dressed in fancy clothes, Lelly Kelli's, has a designer dummy ffs). She is lovely, if a little misguided! The other day she quipped openly that she always dresses DD in 'old clothes, that she doesn't mind getting dirty' whenever they come round to mine...... 
Well, story goes, all DD's were sitting around a little wooden table in my house, eating their dinner (which was a little bit too cute, in my opinion, bless 'em!) My friends DD is messing about on her chair, and manages to tip it over, banging her head on a sideboard (not hard), I dashed off to get the coolpak. When I got back my friend was furious, and went a little bit hysterical on me saying "how could you let this happen?!?!", she then apologised and left with her howling daughter.
I heard from her later saying she over-reacted but was upset that I put the table in a position where children could hurt themselves. She's seen the size of my house, it was the only place left for it!
Just a note - I could not have caught her stricken daughter, as I was 10 feet away in the doorway 'being waitress', while she was an arm stretch away.
AIBU to think that her daughter getting a bump (nothing serious, not even a bruise the next day, she was just alarmed) wasn't my fault, and that my home is not a death-trap because furniture is within bumping distance of other furniture?