It really is painful when you forget to reverse the ailerons. You might find your airplane as Bixler says, "rolled up in to a ball!" I let my 12 year old younger brother fly my arrow. He crashed it so I fixed it but forgot to switch the servo leads. After that It was still able to be flown. So, I through it back up into the air. I was doing some rolls when one of the servo leads got cot in the propeller and down it came.
So I'm spending my Monday morning fixing it up.