Sometimes a hold is just too far away. So, what do you do? Is it possible to fly and land those crucial inches higher up? Yes. It's called a dyno.
So what's this dyno-thing? In simple terms, it's jumping from one hold to another when you just can't reach. Dynoing is leaving the rock completely, propelling oneself - using arm and leg strength - to the next hold. Every dyno is, to a certain extent, unique in terms of holds, angles, length, etc., but there is one aspect in which all dynos are the same: you have to let go...
It's cool. And it's a rush.
Blah blah blah, right? Here's a video - taken with a camera phone so I apologize for the crappy quality - of me dynoing. You'll get the idea.