I had the occasion on my commute to work this week to do a helmet check. I was headed downhill on a side street on my KHS XC204 Mtn bike with a very stiff tail wind. I use this route every day and know its quirks. About 2 blocks down I take a left not a hard 90 less tight. Traffic held my turn up to farther into the corner I didn't slow down. This line brought me over a smooth flat manhole cover. I slid out but was heading down the side street sideways till I hit the uneven surface where the two streets met. This I hit and the bike flopped over to the other side ejecting me down the street. I landed on my back and hit the back of my helmet on the asphalt hard. I had the mornings jacket and shirt in the pack so it was a good cushion and the helmet Giro Xen did its job . after a few stunned moments I assessed the damages . Pedals scraped, elbow bloodied, grips torn a few extra holes in backpack . Today I rode the Western Tire And Auto SilverShield in with no helmet I never wear one with the cruiser bikes. Am I wrong in the head? Oh and even though they say replace the helmet I'm not going to it didn't crack or compress and it's saved me about 6times already.