Anything can be a worry.
You don't have to lost a leg at war to say you have some.
And anyway, that was one reason, but the other is simply enjoying having a moment in the day when you empty your mind watching this kind of things.
Some watch a fire, some watch football, some watch a Michael Bay, some watch cute-childish things that appease them.
(i bet my english sucks balls but you probably understand my point, wich should be enough)