Knock on a motorcycle helmet:
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Tricycle starts, drives away
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Snowmobile starts, expects to jam
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Rides by, ATV makes maneuvers
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The motorcycle will not start
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Riding a motorcycle with a horn signal
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Expects to jam, The motorcycle starts
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Motorcycle signal
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Waits,, Harley-Davidson motorcycle starts
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Jamming, The motorcycle is approaching
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Knock on a motorcycle helmet
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Riding a motorcycle
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The motorcycle starts, expects to jam (from
★★★★★