Early in the game, you'll reach a town called Banora. Near the end of the mission there, you'll encounter a weird little minigame where missiles will be shot towards you and you'll have to cut them down out of midair. This seems like a useless exercise, but in fact how many missiles you manage to halt will give you more time when you have to get back to Angeal's mom's house. What's more, you'll get items and other rewards for cutting the missiles down. If you use the added time to scour the town for more items and grab them all, you'll get an additional substantial reward, including an Ether, a Soma, an X-Potion, an Elixir and a Phoenix Down.