Hi everybody (please insert the usual "search disclaimer" here). Well, I think the title explains by itself, so let me tell you my experience: I knew about rock and roll when I was a little kid because one of my uncles had a marvellous LP collection that included stuff like an altered version of Beatles' "Something New", Bill Haley's "Bikini Twist" "Trini López At P.J.'s" and lots of mexican versions of Little Richard's hits, among many other things (many years later he sold them when had financial problems and didn't tell me. I will never forgive him for that). But it was "light" music. I didn't know about distorted guitars with power chords and raspy voices. The first record I heard with such kind of sound was Bachman-Turner Overdrive's "Four Wheel Drive" back in '75. The three chords that kicked off the LP were enough to blow my mind. I simply couldn't believe my ears. How such "dissonant" thing could be so cool? Besides, it was the first LP I saw with just four tracks per side. "Never seen such long songs!" I thought when I saw it for the first time. From every point of view, that LP had such an impact on me. Even the back cover pictures of those not so clean-cut guys amazed me tremendously. So that record was my introduction to "heavy" music. What was yours? Thanks for your input!