My little sister sent me this video of Mabes while I was in class last week. She miraculously managed to train Mabel to do this trick within the span of 2 weeks (Mabes is on summer break at my parents' house, AKA The Dog Park, with all her little pet friends for the next few weeks).
It's incredible how motivated by food the Mabes is... Of course I was beaming when I saw it and promptly showed it to at least 5 other people in my class.
That smile of hers kills me.