The Magic Circle of Anger Explained: man goes to work, boss yells at man because important letter hasn't arrived. man goes home, yells at partner. partner goes outside and yells at child. child gets cranky and kicks dog. dog jumps the fence in rage and bites postman. postman falls off bicycle and important letter goes down drain. man goes to work the next day...

The Magic Circle of Anger Explained...and, no, glucosamine doesn't help.