My sensei finished what he wanted to teach us a few minutes early on Monday, so offered us five minutes of aikido demonstration to round off the class. He called up the more senior student present, and told him to practice what he wished.
Sensei then attacked the student
First time I've ever seen the sensei act as uke. I don't know why I feel so strongly about that, but it really impressed me that he would be uke. I've never seen another sensei act as uke before, he's usually nage.
Just a thought