Boys in Serbia are playing a dangerous challenge: They climb a moving tram, they could get themselves killed! (PHOTO)

A photo of children riding the tram this way appears from time to time

The tram on the line "7" had careless "travelers" today. Namely, they didn't ride inside like all "regular" passengers, but they "hooked themselves up" to the back of the tram! It is dramatic because those were underage boys and this crazy "adventure" could cost them their lives!

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A photo of children riding the tram this way appears from time to time.

There have been fortunately no accident so far. We don't believe it's the fear from controllers, it must be some challenge.

Or perhaps pure boredom.

People who were standing on the station and saw this unusual scene were all shocked saying "Oh my God!".

(Telegraf.co.uk / Lj. Racic)