Michael J Fox proved he can still rock out at the Waldorf Astoria by playing guitar for Johnny B Goode.
I suppose asking him to do the slide was a bit much.
Check out the video here:
[youtube=http://www.youtube.com/watch?v=P8Y-PdD1TbA]
And check out this video I found of the cast reunited:
[youtube=http://www.youtube.com/watch?v=O6tra0YF22k&feature=related]