Watch the Whammy Bar Vibrato online guitar lesson by Chris Buono from 60 Electric Guitar Techniques You MUST Know
Another way to apply vibrato is by way of the whammy bar, AKA the vibrato arm. This comes especially in handy when you're fretting high on the neck in areas where it would be difficult to apply finger-based vibrato. Another instance is bending. Some players find it more comfortable as well as stable to use the bar while holding a bend steady to ensure better overall intonation.
Looking for inspiration? Alex Lifeson. "Limelight". End of story. Well, not really. You really want the end all, be all? Jeff Beck. Anything. Done.