"We need more people if we're going to do this." You say, "I know some people who can help us."
You and the Professor get into your car and go to find your family and friends, your first stop being your parents house. You draw the Colt 1911 you gathered from your apartment before you left and rush in when you see blood on the ajar front door; the Professor follows with his .38 pistol.
You watch in absolute horror as multiple fish-like creatures eat your parents like piranha! You see red as rage overwhelms you, and you empty every bullet you have into the two creatures with a roar of vengeance, stomping their heads in for good measure. breathing heavily, you grab the shotgun that your father dropped nearby, and take as many shells as you can find.
You lay sheets over your parents' bodies respectfully. The Professor lays a sympathetic hand on your shoulder. "I'm truly sorry." He says, and you nod in response before the two of you leave to find your friends before it's too late for them as well.
One by one, you find five of your friends alive, exchanging your car at one point for a four-wheel drive SUV. Informing your friends of the plan, they arm themselves as best they can.