An essential technique all electric guitarists should strive to master is the art of string bending, which can be used to create personally expressive, vocal-like sounds in unique ways.
String bending first grabbed my attention when I heard Iron Man by Black Sabbath. Guitarist Tony Iommi begins the song by bending his open low E string behind the nut, raising then lowering the note’s pitch to create a spooky moaning sound. When I heard that, my first thought was, “well, you can’t do that on a piano!”