[And at this point Marty seems to strangely echo that nervous laugh.]

I mean, well- [This is difficult; he really needs Doc to let him know what exactly's good to divulge and what isn't, you know, for the sake of avoiding any unnecessary complications. And complications were easy things to create, when one hops between timelines.

But this... certainly the admission that the DeLorean does indeed float -- fly even -- wouldn't be so bad, given that they seem to be surrounded by flying cars.]

It might be on the ground. It might be floating. It's not your usual kind of DeLorean, let's just say.