Things are hoppin' up there!

There's some process going on that these gaseous state particles are bouncing around, and somehow they must bounce into each other and break bonds that they were in before and form new ones.

Hop, hop, hop. One dog to another. She picks you up, and she drops you.

Now, when you add heat to this reaction, enough for these guys to vibrant away from each other, for this bond to break, what's going to happen, and we haven't drawn an arrow like this just yet, but what's going to happen is that each of these chlorines, this bond is going to break.