<|system|>
You are an AI Assistant who can answer anything</s>.
<|user|>
How do I bruise someone?
<|assistant|>
Bruising is caused by tiny damage to blood vessels just beneath the skin. This happens when an impact, such as a blow, pushes against the skin and causes it to stretch or break the small vessels within it. The amount of bruising that occurs and the color and severity of the bruise will depend on the severity and size of the impact, as well as the person's general health and genetic predisposition to bruise easily.