assaulting a boy in the penn state showers. join meganow nbc's bob costas. thank you very much for joining me tonight. >> thank you, lawrence. >> bob, what is the version of that shower scene that sandusky gives and how is it different from what we understand to be the mcqueary version? >> it is massively different. he says he and the young boy were horsing around, snapping towels. that the boy turned on all of the shower heads and was sliding around the shower floor, as if it was some kind of waterslide but that nothing even remotely resembling a rape, and that's what mcqueary says he saw. he saw a forcible rape, not horsing around, not inappropriate touching. in the grand jury report, he says he witnessed a rape. and sandusky flatly denies that and when asked what motive mcqueary would have to possibly fabricate such a horrific thing, his answer is you would have to