Oh yes, and i dont think its really coming from their jaw. Someone correct me if i am wrong but I am pretty sure it does come from their throat. Its sound almost like a light, short cough, a click. Super excited, my cats jaws quiver and makes these, short, click cough sounds... " ack, ack ack"
My cats do this if a fly gets in the house and they chase after it, making these goofy noises. lol