First song to "Blow You Away"...

What was the first song that hit you between the eyes and took over your mind? Something that really put you into an altered state (without the drugs).

The first time I heard "Whole Lotta Love" in 1969 I couldn't believe what my ears were hearing. Jimmy Page's guitar grabbed me by the head and turned my brain into a Denver omlette.
"The Pusher" (Hoyt Axton) performed live by Steppenwolf at the Olympia in Detroit (1969?), 4th row (my ears are still ringing). It was a mind-boggling awakening to loud, fuzzy, gutteral, blues-rock ... thank God!
Itsy Bitsy Teeny Weeny Yellow Polka Dot Bikini....just kidding.....actually I think it was Neil Diamond's Cherry Cherry.
..wasn't sure why (only 11 at the time), and wouldn't for a number of years, but it was completely different than anything I'd heard to that point.
Jameswei - I almost selected Light My Fire by the Doors, because it really stood out for me at the time. It's still one of my all time favorites.
Gimme Some Lovin - The Spencer Davis Group. This is the song that "turned me on".