Short bending is one of the easier bending feats to get started with. The classic strongman act always involved bending one or more 60D (called 60-‘penny’) nails. When you get to this level you are on your way.
Of course, that is just the beginning. My personal best bend is with a Grade 8 Bolt, as seen below.
There are several ways you can grip a nail to bend it. The three most common are double overhand, double underhand, and reverse styles (the latter is the one I prefer and show in the video above).
Below you’ll see Jedd Johnson bending the Red Nail, which is a challenge nail put out by Ironmind that few people in the world can do.
This video discusses how to get started bending nails:
Here are five steps covered in this video:
1) Building a foundation of strength to ready yourself for bending (especially by using sledgehammers)
2) Getting wraps
3) Buying nails and steel stock
4) The 3 main styles of bending, how to do them, and why you should train all three in the beginning.