It sounded less like a spontaneous reaction than an attempt to do the right thing.

In most conversations, the responses are a spontaneous reaction to what has previously been said.

Their spontaneous reactions, as one can easily imagine, are often dramatic.

The killings last week, he said, "were a spontaneous reaction."

Never before have I received such a strong and spontaneous reaction on any book.

In her view, the violence, was "a spontaneous reaction to a lot of injustice."

It had just been some sort of spontaneous reaction.

"I've been in this business for 21 years and you don't get that kind of positive, spontaneous reaction."

He said he wanted to check the spontaneous reactions of several people.

When a spontaneous reaction occurs energy is released and the products are more stable than what you start out with.