To win easily you must first knock the person down then keep doing grappling moves he or she might reverse it but it usually doesnt happen to me so good luck

In the "Backyard",theres a can beside the mattress and,at the "Manison" theres a can beside a table press Triangle to pick the can up.

Then the table or mattress will catch on fire ( don't get hit while doing this or you gotta start over) you can also pick up the other weapons throughout the game with Triangle