That shit happens man, you could ride for years and never have it hapen or have it happen a lot, its a gamble like riding. Dont sell the bike unless you want to get another or stop riding all together, it wasnt the bike. I'm not sure how long youve been riding but advice I read somewhere I cant remeber is its not a matter of if you will go down its when, hell a motorcycle cant even stand up on its own it needs a damn kickstand