So, I got into his teaching through the Drum Channel, watching his master class on "rhythm". Efrain has taught lots of "famous" guys, such as Terry Bozzio. The videos blew my mind with his very esoteric and unique way of relating nature, vibration, waves to rhythm.... things that I have always found to be interconnected. I found him on Facebook and added him, he accepted and I messaged him, had a nice conversation and he said he'd call me. Well, he actually did. I have to say, it was one of the most enlightening and interesting conversations I've ever had. I highly recommend checking this guy out. Truly a master percussionist and great mind.