for my 7 year old, my therapist has recommended trying coping skills like distracting or strong sensations (sour candy, splash cold water on face or take a cold shower).

She suggested that trying to get him to talk at all when he's angry is probably not going to work because the anger is so intense, so anything that gets him away from being hurtful or destructive during that period is best, and then talk when he's not angry, explain that you want him to do these things so he dooesn't get in trouble..