Whichever one of you was there may well have acted on impulse.

Though he'd learned something of the woman, acting on hungry impulse had been a mistake.

I am always involving myself in some scrape or other, by acting on impulse.

That Mike was a person who acted on impulse and emotion, not reason.

To be able to improvise and act quickly on impulse.

You'll find she is well known for acting on impulse.

I figured that she'd acted on impulse when she turned around and started back.

Sometimes it's not a good idea to act on impulse.

I met her at a party, and acted on impulse.

Once again I acted on impulse to help someone, and many more have paid the price for it.