This is the sight that greets me 9 times out of 10 lately when I go to check if Hamish has fallen asleep. Now that he can roll over, he thinks bedtime is a great time to practise! Unfortunately he doesn't know how to roll back over yet, either that or he just doesn't want to.
He has to be really tired to actually nod off - I try to strap him in with the sheet but he's too strong and wriggles out of it in the blink of an eye.