i was goin to explain how to bend, but its hard to put into words. this site even has video examples, kinda funny to see...
http://www.actiontab.com/bending.html
so tips;
1. its easier to bend with superlight strings.
2. easier with a low action. (where strings are closer to fretboard.)
3. u dont want to over bend. u bend just enough to mimic one note higher. sounds better.
4. practice