Dick: Now, here's two things we haven't experienced. Visit a parallel universe or rent go-karts.
Sally: Wait. Visit a parallel universe? How is that possible?
Dick: Simple. We just use the time/space portal in the closet.
Harry: Okay, here's my concern. Do they get angry if you drive the go-karts off the track?
Sally: Wait. So you mean to tell me that we are living another existence in another place?
Dick: Actually, Sally, everyone exists in every possible place at every possible time.
Harry: W-w-wait a second. That means that somewhere right now I'm driving go-karts. All right.