I have bumped walls, the ceiling, AND the wife and

The propellers are protected if you bump a wall.

It ends up flying crazy, hitting the wall and falling on the floor

Hit wall, fall down hard multiple time and still working.

I smack walls and the floor it does not care

I highly recommend as to the USB port charging

If it hits someone while still spinning it can definitely hurt as the is nothing to cover the spinning propellers

but it’s working as it should now