Here are some tips you can use to avoid driving into your garage while your bike is still on your car's roof rack, based on experience and careful consideration:

- Hide your remote garage door opener so you will think twice before opening the garage door and driving in.
- Try not to clutter your mind with thoughts of having sex with your partner while you drive up to your house.
- Don't try to hurry up and get home before Law and Order starts

If you do end up doing it, at least savor the horrible crunching sound the bike makes as it gets smashed off the twisting and bending rack, bounces off the car, smashes your rear windshield and slams onto the ground breaking your cute mirror accessory for good measure.

Note: This happened to me twice so far. I still prefer a roof rack to a rear rack.