Well my wife today closed the garage door on my bike. It came down on the top tube and put a very small dent in it. I want to emphasize that it is a very small dent. There is also a small chip of paint missing. The bike is made of aluminum and it is a Cannondale. I am sure it is alright to ride but I want to hear what you guys think. Thanks.
Not seeing it, no one on this forum can give you advice. You'd be pretty angry with us (while sitting in the ER picking asphalt out of your hide) if we told you otherwise. Take it to your local bike shop (LBS) and let them evaluate it. Good luck!