In my 7.30 lesson I set up a skype "mystery guest" Which excited the kids no end. They established that the person was in the UK, which then led to questions about time difference. 
Student 1 "What time is it in England?"
Me. "Well England is an hour behind us, it is 8 here. So it is 7 in the UK."
Student 2 "What in the morning?"

Welshy also had a child jump out of a window today rather than stay in his lesson (I feel I should point out, that it was because they wanted to rescue a pen that Ed chucked out the window).