I'm certain there's a word for it...

The sense of horror one gets when witnessing from afar a tragedy unfolding but being unable to either avert the disaster or to even warn the soon-to-be-victiims of what the certain doom which approaches. From your office window, you see the train and the car stalled on the tracks. In cinematic slow motion, it dawns on you that the crash is inevitable and you have no time or means to alert the engineer nor to signal to the driver whose car straddles the rails. Even though it has yet to happen, it will, as certain as the rising of the sun. 

Which is to say, my family, rabid supporters of the Three Lions, taped the England-Uruguay match and implored me to keep the result to myself.