The father of a teenage rugby player says that potent form of cannabis turned his son from a “bright bubbly lad” into a “waste of space.”

ThinkStock

The teen started smoking weed when he was 16-years-old but had switched to "skunk." The change made him paranoid his father said, “He became delusional, he used to sleep with a tennis racket in his bed because he thought people were living in the walls.”

It all climaxed when the teen woke up in a psychotic state and attacked his mother. He stabbed her multiple times before cutting off his own penis.

His mother was hospitalized and has since reconciled with her son who remembers nothing of the ordeal.

Read more at Daily Caller.