Here's my take, which should qualify as "reasonable," at least IMO. Sadly, when JB put Williams in the game just 6-8 minutes in, the game's outcome was already decided for all intents and purposes. So, Benny was able to simply play the game of basketball, you know, as he has his entire life and have fun in the process. There was no worries of looking over his shoulder, playing tense, if one mistake was made getting yanked. Just play hoops.
Now, this was the only game so far in his short SU career where that has been the case. So, the cross section of data in that particular regard is nowhere abundant enough to conclude with any degree certainty of course, but that's my "reasonable" explanation.