Can' keep my head up!

I really shouldn't have gone into a long training course as my head, and in fact my whole body, wants to fall asleep and I don't think I can stay awake all afternoon. This jet-lag really is no fun at all and I wonder if I'm taking in anything ,that we are being taught! Hopefully I'll be able to stay awake and not actually hit my head on table! Goodness, now I've really lost where we are up to on the course! ZZzzzzzz

Update: Even writing this above I was falling asleep and losing track of what I was writing!