You are given a passage. Using the information present in the passage, you need to classify it into one of the 10 topics: 0 - 'Society & Culture', 1 - 'Science & Mathematics', 2 - 'Health', 3 - 'Education & Reference', 4 - 'Computers & Internet', 5 - 'Sports', 6 - 'Business & Finance', 7 - 'Entertainment & Music', 8 - 'Family & Relationships', 9 - 'Politics & Government'.

I'm afraid of someone I love falling from something tall & I'm not able to save them.  Can you imagine me at the grand canyon?  I'd ruin the trip for everyone :)
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From About.com:\n\n"To quote means to repeat the exact words of another with the acknowledgement of the source.\n\nA quotation is a phrase or a sentence from a book or a speech that reflects the author's profound thoughts."
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unless the cracking is painful, it is not unusual or dangerous for your knees to "crack".\n\nLunges are excellent for strengthening the muscles around the knee joint. Make sure that you are not leaning over the knee, that the knee is right above the foot during the lunge and that you maintain a straight upright movement.\n\nDo not do hamstring excercises that will pull on the knee joint if you have problems with your knee. \n\nelipticals are good for running on with minimal knee and ankle stress. \n\nyou can also get large elastic bands...stand in them, and step out to the side pulling on the bands, then back in. Don't pull harder than is comfortable, this will help increase the stablization of the knee.\n\nLaying on your back you can pull your knee to your chest, and then extend it, locking your knee holding the leg just over the ground..repeating, this will also help strengthen the muscles around the knee with minimal weight on it.\n\nAlways is good to speak with a doctor or physical therapist if you have concerns.

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