[Bruce has given up predicting how Tony is going to react to this multiples issue. It never makes any sense to him-- he just gets left with the fallout. Might as well prevent it if he can.

And he's more willing to admit to actual friends at this point, but it still feels a lot safer if he doesn't. For their safety, not his.]

I... Yeah, I do. [He sounds entirely rueful to admit it.] And maybe you can explain to us what you're doing with diatomic lithium as a fuel source back home.