yesterday was a pain in afternoon went up to park to do some photography and these same old school kids won't stop harrasing me and got to the point where they decided to knock my chain off and kick my bike etc... and throw my helmet around so 1. How do i know if my helmets broken because even though there's no cracks they kept throwing it around on the grass etc... till they threw it back at me so the foam could be damaged 2. My bike is making this weird noise like a slight clicking noise. By the back wheel but i just tested it as i thought it might be coming from the chain but i know it's not as i just stopped the chain moving and then spun back wheel and i can't tell if it's disc brakes on bearings (If there are bearings in the hub by disc brakes) as i know it's only coming from back wheel and it's not the spokes as their still straight. So didn't ride today as before the gears got stuck because those kids were also messing with the gears. So i'm wondering if that noise is also caused by those kids because my bike has been quiet and not made any noise. There's also slight chips in the frame from those kids. Do you know?