Lock if old.
http://www.huffingtonpost.com/2013/07/16/jake-gallagher-xbox-heart-attack_n_3605082.html
A UK teen with an undiagnosed condition suffered a heart attack while playing Xbox, and later died after two days on life support. He was 16.
Jake Gallagher was playing his favorite Sonic The Hedgehog game in April when he had Sudden Arrhythmic Death Syndrome, The Sun reported today. He was revived by first responders but declared brain dead and went on life support.
His mother, 46-year-old Sarah Pyatt, told the paper. "Sonic The Hedgehog was his favorite. He would get over-excited, jumping up and down, screaming at the screen."
[...]
A hospital professor in London told reporters that there is a "definite risk in predisposed young people playing video games that causes surges of adrenalin in the blood."
http://www.huffingtonpost.com/2013/07/16/jake-gallagher-xbox-heart-attack_n_3605082.html