For me it would have to be when I was a teen, I was a hardcore World of Warcraft addict and a relative tried to take my computer away so I couldn't play anymore because I was spending 10+ hours a day on it so I pulled a knife on him and charged him with it and when he subdued and restrained me, I threatened to kill him in his sleep.

Needless to say, the cops were called and I was carted away in handcuffs over a freaking computer game and placed in a psych ward for what ended up being over 6 months because I had all sorts of behavioral issues when dealing with the staff and their rules lol.