Quick, get in the van. There's no time to explain.
Quick, come with me. There's no time to explain.
You're in danger. There's no time to explain.
Seriously, it seems like it may be the most overused line in cinema. There's never any damn time to explain anything. Hell, I don't think I could accept that. If you have time to say "there's no time to explain," you could probably try your luck at a half-assed explanation.