Don't even think about it!

Ismael was a trainee on a CELTA course last year (?) and now has a much coveted place on the TSP (teacher support programme) here in the BC Cairo. We were laughing and remembering about when, just before feedback on his teaching practice on the CELTA course, he threatened his peers with this Egyptian gesture meaning in that context, 'don't even think about it!' and then he taught me how to do it. I took the chance to record the moment when he reminded me how to do it again here.