Here's why it's a bad idea to put your phone's screen up on live TV

Sometimes the thought of sabotaging your friend's live TV appearance proves too difficult to resist.
Ted Kravitz, a pit lane reporter for Sky Sports' Formula 1 coverage, was at the Brazilian Grand Prix on Sunday. 
Kravitz was showing off pictures of New Zealand driver Brendon Hartley as a child on his phone in his segment Ted's Notebook, explaining why Hartley had chosen the number 28 for his car. 
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But someone couldn'