Is it an option? I think if you move the time moves as well. If you aim badly you still need more time to get it right. You can just take a break in the middle by not moving at all. At least that's how I understood it.
In the original 7-day prototype, time moved at a crawl if you stood still, and accelerated to normal speed when you moved. Changing the view with your mouse did not count as "moving" so you have a lot more time to line up a shot. Of course you also have to contend with travel time of characters and bullets, which is not a wholly trivial task.