Picking Up Debris
In GTA 4, you are able to interact with the environment of Liberty City in a variety of interesting ways. Take for instance the pick up command. If you hold L1 next to an object such as a pop can or a cinder block, it will cause to Niko bend over and pick that object up.
To throw the object: simply lock onto a target using L2. To freelook aim, lightly hold the L2 button and aim using the left analog stick.
Go and give it a try!
