Master Laranja has one of the biggest personalities in all of BJJ and demonstrated it as he made fun of everyone in attendance for the first half hour. I really liked that part.
He went on to teach some slick counter moves, including:
1) A triangle choke you can get from when someone tries to pass your guard with a double under.
2) A shoulder lock from when your opponent sinks in an arm triangle.
3) An escape from the D'arce choke that he's used on Bill "The Grill" Cooper.
Good seminar and great opening act.