Make noise to defeat Venom. When you hit him, Sandman will raise his fists off the ground in an attempt to crush you. Dodge this by running through either of his fists. When Harry throws a grenade and it explodes, it will stun Venom for a few seconds and make him vulnerable to all your attacks. Note: You must be nearby when the grenade explodes or else he won't be stunned. Also, there are health packs on the two sides of the building that respawn after you use them. If you are lucky, two may appear in the same location, doubling the health you can receive.