Kids are going to be weird and use their imagination. They'll pretend to be an NFL player breaking tackles as they run through a crowded school hallway. They'll pretend to be Optimus Prime and pretend to transform into a truck. Or they'll pretend to be iron man blasting bad guys with their lazer palms.
The issue is when your friends have aged out of that behavior and you think it's still cool to Naruto run up to them all the time.