A storyboard of the obstacles Harry Potter, Hermione Granger, and Ron Weasley have to go through in order to stop Professor Snape from getting the Sorcerer's Stone.
The first obstacle is to get past Fluffy, the three headed dog. The only way to get past Fluffy is by lulling him to sleep with music.
He'll be okay. We have to keep going.
In order to get to the second obstacle, they must jump through the trapdoor where they land on the Devil's Snare. Hermione saved them by using Lumos to cast light and repel it.
The next obstacle was finding a key that fit in the keyhole on the door. Finding this key would lead them to the next obstacle. Harry finds it with his experience as a seeker.
In this obstacle, Harry, Ron, and Hermione must be in a game of chess and win in order to cross the room and reach the next obstacle. Ron's chess experience led to his removal which won the game.
Because they were chasing down Snape, this obstacle had already been completed. When Harry and Hermione entered the room a troll was on the floor out cold.
In this last obstacle the duo must use logic to find out which potion will get them through the black flames and onto stop Snape, and which one will send them back through the purple flames. The smallest one gets only Harry through the flames while Hermione goes to get Ron and Dumbledore.