Who says there's no such thing as time travel?

For many years, I've said that you couldn't pay me enough to go back to a previous age unless I could take along all my accumulated knowledge. So, what's it like to have your education interrupted for 15 years and then go back to finish the job? Exactly like that. I feel like I've gotten to go back in time 15 years and take along all the accumulated knowledge of those years. Everythings the same, but it's all different. What a trip!