rkd, I know what you mean exactly an in earlier times it would have been totally unthinkable for MK band members doing this.. but I think MK starts the thing with his grinning during his "Plane imitation" at the beginning of the solo - he clearly laughs to Richard/Mike and Glen/John, and from there on, the good mood rolls over to Ianto... who carries it on to Guy, at least that's my impression... so no big deal. The drumming itself is as execellent as ever.
LE