Boulders

Boulders have been seen throughout the Resident Evil series. They are usually set up as environmental hazards.

Resident Evil
In tunnels under the Spencer Mansion, two booby traps are set off a boulder that rolled down the hallways. The player must run away from these to avoid being crushed.

Resident Evil 4
A few boulders appear in Resident Evil 4. The first one is a booby trap by the village ganados in attempt to crush Leon. In order to escape it a quick time event must be played where the player has to rapidly push the run button or shake the Wii remote and then press the dodge buttons. The ganados do this type of trap several times throughout the game.

Another instance you see a boulder is mines under the castle where a one blocks your path. Leon must use dynamite to blow it up and continue.

A last boulder is encountered on the island. The militia set it up to fall on Leon. The player only needs to dodge this one.

Resident Evil 5
The only notable boulder that appears in Resident Evil 5 is during the ending fight with Wesker. When Sheva reaches the end of the volcano path, Chris finds he has to create a stepping stone by moving a boulder at the edge of his path. Hyped on adrenaline, Chris struggles to push and manages to punch the boulder into the lava to save Sheva.

In game, the moving the boulder sequence in done through a quick time event. On Xbox 360 the player must rapidly push X, then circle the thumb stick, B, X, A, then push X and A to complete the sequence. On Playstation 3 the buttons are square, thumbstick, O, square, X, and then square and X.

Trivia

 * The use of the boulder in Resident Evil 1 seems very inefficient. If the target were to survive, the boulder actually ends up opening two paths for the survivor.