Hesitant to really consider this an accident, but aside from the occasional stab wound from an errant craft knife or dropped miniature, this stands out to me.
Back with the "Miss Right (then)", she had a 2year old son. He was curious about what we got up to. The stuff we did in the front room during the day that is, the painting.
We woke up to find his curiousity had got the better of him. He'd managed to open the box of paints, no small feat that. Managed to open a pot of paint, again no small feat. Managed to use a brush and basecoat a mini with Ultramarine Blue. He'd done a surprisingly good job, used the right end of the brush, the paint was even if a bit gloopy, had only spilt paint on half his limbs and but a small part of the carpet. I was quite happy he'd felt fond enough to want to be included. Unfortunately he'd chosen the Wood Elf Champion I'd gone to bed happy that I'd finally finished. His mum reacted far more harshly than I did. Still got that Ultramarine slathered Wood Elf somewhere.