freeze time but you could walk about and do what you like. Maybe get a few hours extra kip.

During this frozen time you do not age and nothing has negative health benefits. Also everything resets it self so nobody is none the wiser. However if you say took something during this frozen state you have a magical bag that keeps any items from the frozen state.

or B.

The ability to go back in time exactly one hour. You can't take back any items but you will remember everything in that hour. You could avoid situations or perhaps gamble on sports.