Sam's work time-after-time has shown precision, affluence, style, and raw energetic talent. Video game remixes just don't get better than this. There's a lot of detailing here revolving around a relatively simple melody. It's classic stuff, no doubt, though the technology was inherently limiting from a creative standpoint.
To go in an expand on the tune w/ his purely on-the-fly arranging virtuosity is both astounding and inspired. As David pointed out, it's frightening that this is after all improvised - but I'm not surprised; Sam is the real deal. I've heard this kind of instantaneous ingenuity first hand... it's just jaw-droppingly cool.
And that ending... nothin' beats it. Freakin' fantastic. Thanks for such a great Christmas present, Sam. It's definitely from the heart.
Jeron