You shouldn't harm yourself.
Dave comes home to his crying wife, Ann who tells him that Dave's mother has passed away.
Dave wants to distract himself to make the pain go away.
Dave goes downstairs to the basement and begins playing his drum set loudly.
Dave goes to the kitchen and grabs a knife and begins to cut himself.
Ann is understanding why Dave needs to get some energy out and is happy he's found something to ease his stress.
Ann is shocked and freaked out and worried about Dave and his safety and shakes with fear.