RE: How does this happen"
Stefanie,
Speaking as a private pilot, r/c pilot, and aviation junkie, please accept my sincere condolences on the loss of your father. I didn't know him, and I never saw him perform, but it's clear from your post that you are very proud of him and loved him a lot. I can't imagine the sense of loss you must feel, and I know my words can't change that, but he did give you a wonderful gift by sharing his love of flying with you. Without meaning to sound corny, I hope he continues to live on in your memory, and in your flying. Best wishes.
David