I've just bought a Bumbo baby seat and want to know if anyone's baby has managed to get out of it. My dd2 is 5 mths, when she gets fed up with being in the chair she arches her back and it looks like she could almost jemmy herself out of it. I've read of older babies being able to get out by putting one hand on the floor and lifting themselves, she's no-where near that stage but I'm wondering if it's safe to leave her alone in it for a minute or two or if she could actually push herself out. (Ok, I know we're not supposed to leave them alone but...)