I agree with Both Pat and Doug. In case you don't understand what Pat was referring to, climb cutting is when you try to rout in the wrong direction and the router bit tries to feed itself into the work. The router will try to pull you along with it. Routing in the right direction you will meet a little resistance.
Trapping a board is referring to routing on a table mounted router where your board is between the router bit and the fence. This is a very bad practice that can result in personal injury and a damaged router. Any time you are not sure if what you are doing is safe, just ask. There are safe ways to do just about any routing job and someone (or many) will offer advice.
Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.