Slumps happen to the best of us. The best way to cope with it is not to get aggravated at bad shots, or whatever the case may be. Possibly you're doing something different, which is causing you to develop a bad habit. If so, try to remember how you were throwing it before. Also, remember that the slump, most of the time, will come to pass, and you'll be back to normal.
Hope this helps!
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Sean from Chicago
KILLWHITNEYDEAD
Viva La Marijuana!