In The City on the Edge of Forever, we see McCoy go back in time in a drug induced state. He meets a street bum and then passes out. The bum pats down McCoy and steals his phaser.
As the bum checks out the phaser, he appears to turn the wheel on top, the phaser then begins a slow whine, almost as if warming up. The bum then turns the phaser around and vaporizes himself.
I always wondered what exactly happened here. We never heard the slow whine of a phaser before (except in overload) so did the bum accidentally set the overload on the phaser? I don't think so because I would imagine there would be some type of explosion. It seems as if the phaser fired while the bum had it pointed at himself.
Every time I saw that episode, I just figured that the slow whine build up was due to the fact that McCoy had traveled back in time and it somehow had an effect on the phaser.
Any other explanations for this scene?

As the bum checks out the phaser, he appears to turn the wheel on top, the phaser then begins a slow whine, almost as if warming up. The bum then turns the phaser around and vaporizes himself.
I always wondered what exactly happened here. We never heard the slow whine of a phaser before (except in overload) so did the bum accidentally set the overload on the phaser? I don't think so because I would imagine there would be some type of explosion. It seems as if the phaser fired while the bum had it pointed at himself.
Every time I saw that episode, I just figured that the slow whine build up was due to the fact that McCoy had traveled back in time and it somehow had an effect on the phaser.
Any other explanations for this scene?
