How does technology know the right time to strike?

I find it strange. There, I am, watching some TV programme streaming live on a TV channel online and just when it gets to the point that the entire crime is going to be explained...that's when the image freezes and when the streaming service recovers, a minute or two has gone by and the entire explanation is over and you are no wiser.

Or I'm listening to the radio online and just when it gets to the last few minutes of a radio play, the computer freezes and I have to restart the entire computer. By the time I've switched the radio back on, a new programme has started. 

How does technology know the right time to stop working? Just when it gets to the interesting point in the programme, whether on the radio or on TV, it goes on strike, spoiling my enjoyment. How does it know? Do I somehow give off vibes that the computer picks up on and, like some vengeful Greek god, then decides to put a spoke in my enjoyment of life? Heaven only knows.