Category A: those whose escape would be highly dangerous to the public or national security.

Two of the lower turns were so short as to "make speeding around them highly dangerous."

My two friends and I regard you as highly dangerous individuals.

That kind of knowledge could be highly dangerous, and she would do just about anything to keep it from him.

They are highly dangerous and might try to jump in among you for cover.

We know now that it is highly dangerous for us to leave the cabin.

For the Ego, it is highly dangerous to get too close to anyone.

Travel or mountain climbing in this area is highly dangerous.

You have the reputation of being a highly dangerous and very violent man.

"It seems highly dangerous from a moral or ethical point of view."