“There’s no way to tell the difference at the moment. I’d just want to ruin the party… But the majority of people here are innocent.” So he won’t be doing anything. Especially if he can’t even reasonably conceal his explosives.

“I’d need a lot more than the aid of some peeping Tom to do this without being seen. And I’ve got someone I’m looking after who’d suffer a good deal if this goes South.” So basically… whatever his plan was, he’s considering canceling it.