E/O Challenge: Eighteen

A milestone age.

When John Winchester was 18, he was an enlisted Marine serving overseas.

When Mary Campbell was 18, she went to senior prom solo, staying faithful to her overseas boyfriend.

When Bobby Singer was 18, he was working as a mechanic and learning the salvage business.

When Dean Winchester was 18, he had a dozen supernatural kills under his belt, his dad's beloved Impala as a gift and no little brother to care for.

When Sam Winchester was 18, he was alone, on his own and starting his new, supernatural-free life at Stanford.

Who were you at 18?