I absolutely love the blue-sy transition in this song (seconds 4-5). It's kind of like overshooting a note and coming back to it with some blues notes mixed in (bear with me, my technical knowledge here is ZERO). I can't really figure out what's going on, though. I mean, I can play the same melody/basic notes that the keyboardist is playing (one key at a time), and it doesn't sound the same. They seem to be doing multiple notes at a time for each step along the transition, or something.
Anyways, I've heard this kind of transition in a lot of electric piano type music from the 90s especially, and I love it. I'd love to learn it; to figure out what's going on. But I don't even know what to search for.
Is there a name for this type of transition? Also, what is going on in it? Any ideas where I can watch/read more about this type of transition?