Even samurai would have been vulnerable had they been glued to smartphone screens while walking.

So says a video parody unveiled Tuesday by mobile carrier NTT Docomo Inc. that depicts a legion of samurai warriors undertaking a ritual pilgrimage while fiddling with their smartphones.

The troops bump into each other, trip and fall — just as smartphone addicts do on the streets of Japanese cities. In those days, it could have been more serious: Some of the samurai are ambushed and killed while distracted by their gadgets.