BY TOM AND RAY MAGLIOZZI Modified: October 5, 2012 at 11:42 am •  Published: October 5, 2012

RAY: Car glass also is tempered, which means it's been specially manufactured to be harder to break. And when it does break, it's supposed to shatter into small, non-sharp pieces. That's so that in the event of an accident, there are no shards or dangerous glass spears that can injure the car's occupants.

TOM: The way you break tempered glass is with a sharp, pointed object. A hammer, along with something like an awl or nail set will suffice. Or there are special small, pointy hammers made just for breaking car windows in an emergency. So it's a good idea to keep something like that in your glove box.

RAY: If you find yourself stuck without such a tool, your best bet probably is using your feet and trying to push out the windshield or rear window. Neither of those is set in tracks, like the side windows, and they may be easier to dislodge than the windows in the your car's doors.

TOM: But our best advice is to be very careful around water. It's hard to know how deep a puddle is before driving into it. So if you do encounter a puddle of unknown depth, proceed very, very slowly, and stop if necessary. Or even better, wait until some other knucklehead goes through it and see if he makes it first. Good luck, Yang!

Keep your car on the road and out of the repair shop by ordering Tom and Ray's pamphlet "Ten Ways You May Be Ruining Your Car Without Even Knowing It!" Send $4.75 (check or money order) to Ruin, P.O. Box 536475, Orlando, FL 32853-6475.

Get more Click and Clack in their new book, "Ask Click and Clack: Answers from Car Talk." Got a question about cars? Write to Click and Clack in care of this newspaper, or email them by visiting the Car Talk website at www.cartalk.com.

(c) 2012 by Tom and Ray Magliozzi and Doug Berman

Distributed by King Features Syndicate, Inc.

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