I suspect it is quite normal, depending upon how low you let your BG go. When I was in 6th form, I went hypo over lunchtime after I'd been in the workshops. I gave my keys to the metalwork teacher thinking that I was actually giving him his own keys back. I ended up passing out in the 6th form common room and being brought round by one of the biology teachers who knew that I was diabetic.
Thankfully, this was in the now long gone days of having two injections a day of Actrapid and Monotard and manual mixing.