Burnin' Down the House - S6-E1
Continuity mistake: Right before Will pours the liquid into the pot, you can plainly see a fire extinguisher on the counter behind him. It's gone when the fire is actually burning.
Burnin' Down the House - S6-E1
Continuity mistake: The cognac bottle is almost empty when Will passes by the counter, but when he turns around to pour the liquid, the bottle is full.
Answer: He believed he was asserting his independence and individuality, not giving in to the conformist rich society. Movie quote, "I don't act this way to change the world. I act this way, so the godamn world doesn't change me."