As the title suggests, coasting home after work today and felt a fat bump from top left of the car. Wasn't a ditch but musta been some big stone/rock. Either way it shook me up so got home and looked at it to find this: It's like theres a bubble within the tyre. Is it gonna burst? Should I change it ASAP? I can't believe it. I ALWAYS keep an eye out on the road and make sure I don't hit anything. Bloody camoflauging stones!