I can’t narrow it down to just one, I have several, but I will give you a couple within that small group. Baby Let’s Play House still knocks me out. Young Elvis just cuttin’ loose in the old Sun studio with a stunning performance. Another one is the flip side of a record I got for my 6th birthday and I played it till the grooves turned white. Jailhouse Rock was the “a” side. This is the “b” side that’s still a fav.