It was a half-joke, but think about it.
Can we really comprehend the timespan implied?
If you look at it in number of years, then it's about 3 times the age of the universe!
That's one heck of a loooong time!
According to quantum theory, specifically quantum tunneling, if you were to run into a wall once every second, it would take you roughly the age of the universe to pass through it. HEHE!
In your number of years that we calculated, you could have passed through the wall, passed back to get your wallet that you forgot, and then run back to the other side.