Yeah, seriously.

[a beat]

But uh -- almost done. Gimme, like, thirty more seconds.

[and then he's going to go back to it, making short work of the bomb before putting his phone back together. when all's said and done, he holds the Doctor's sonic screwdriver back out to him]

Okay, so, it should work like one of those party snap firework things they sell around Fourth of July. [you know the ones] Theoretically, anyway.

[obviously, he didn't have time to test it]