How to deter train surfers Indonesian-style!

Indonesia has gone to imaginative extremes to try to stop commuters from illegally riding the roofs of trains. The images below are common sights in our region... train surfing!

...and the creative solution?

OMG! You kidding meeh?

Now the authorities have an intimidating and possibly even deadly new tactic: Suspending rows of grapefruit-sized concrete balls to rake over the top of trains as they pull out of stations, or when they go through rail crossings.

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[source]