When I was a kid, my friends and I used to ride our bikes down to Shea Stadium and sneak in the back, through the bullpen and out on to the field. Only during the off-season. They didn't have much so security back then.
We'd run around on the field, marvelling that we were running in the same place that the great players of the day were playing. Roberto Clemente, Willie Mays, Ron Swoboda, Ed Kranepool.
Anyway, that's what I feel like now. Like someone left the gate open and I get to run around on the field and play whatever game I want. :-)