TedStixon

Answer: In the context of the movie, I believe they're referring to a moment where it appears everything is over, but is about to start up again. In real life, the term is evidently a term for a specific area that weather radars can't necessarily pick... usually very close to the radar since being overhead would mean they're outside of the radar's angle.

TedStixon

Answer: In the TV series "Get Smart", there was a device called the "cone of silence." It's used so that no one could hear private conversations, but it never worked properly. It was most likely a cultural reference.

Answer: Reportedly, their personalities just didn't mesh, and it was also a very hectic shoot due to all the effects. So, the atmosphere was high-stress, which isn't typically conducive to people getting along. Though Hunt has stressed that they were always cordial after filming was complete and had even talked about potentially working on a sequel together a few times, so it seems that they didn't overtly dislike each other.

TedStixon