This is my understanding of this story; others may know it better.
It was the last day of term last year. We had all been to and from the boathouse all day where the club tried to have a barbecue but kept getting busted up by services. Finally at about 1am, when we're the last ones on campus, a crowd of us - Dee and myself included - who had been hanging out on the steps of the biology building wander back down to the boat house. There's a services jeep outside and some services folks talking to a small crowd of canoe club people, so we hang back to see what's the what.
Except Dee, who waltzes right into the boathouse, flings open the inner doors, revealing a crowd of... revellers... inside, who've now just been busted having a naked party in the back of the boathouse while Mark was out front explaining to services that he was the only person there.
And then, icing on the cake, she says "Guys put your clothes on, services are outside", picks up her stuff, and waltzes off into the night again.
(I'd love to hear this story from the perspective of someone who was inside the boathouse at the time)