Chris Ferguson (Game theory problem)

I recently read a book which had a game theory related problem originatly presentet by Chris Ferguson...

NL HE 1$/2$

Everyone folds to SB (50.000$) who makes it 5$ to go.
Before BB (50.000$) looks at his hand SB accidently reveals two black aces...

Well apparently game theory somehow dictates that BB can call with any hand and then bet any flop that gives a random hand 15% or higher of winning and the aces will have to fold...
If you know this problem and the reasoning behind the solution then plz try to explain it to me in a way I can understand [img]/images/graemlins/confused.gif[/img]