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  2. Wagon-wheel effect - Wikipedia

    en.wikipedia.org/wiki/Wagon-wheel_effect

    The wagon-wheel effect (alternatively called stagecoach-wheel effect) is an optical illusion in which a spoked wheel appears to rotate differently from its true rotation. The wheel can appear to rotate more slowly than the true rotation, it can appear stationary, or it can appear to rotate in the opposite direction from the true rotation ...

  3. Freestyle skateboarding tricks - Wikipedia

    en.wikipedia.org/wiki/Freestyle_skateboarding_tricks

    A G-Turn is a Nose Manual, but without facing the riding direction. The rider increases speed, then places the front foot on the nose while keeping the back foot over the back wheels. While riding, the board tends to turn frontside or backside, ending with a spin. Variations: One-Wheeled, Backward, Hang Ten (two feet on the nose)

  4. List of skateboarding terms - Wikipedia

    en.wikipedia.org/wiki/List_of_skateboarding_terms

    There are two bushings per truck, one above and one below where the hanger fits onto the kingpin. These are sometimes called the boardside and roadside bushing, respectively. Like wheels, bushings are available with different levels of hardness. The kingpin nut may be tightened or loosened to adjust the turning radius and response of the truck ...

  5. Stroboscopic effect - Wikipedia

    en.wikipedia.org/wiki/Stroboscopic_effect

    It accounts for the "wagon-wheel effect", so-called because in video, spoked wheels (such as on horse-drawn wagons) sometimes appear to be turning backwards. A strobe fountain, a stream of water droplets falling at regular intervals lit with a strobe light , is an example of the stroboscopic effect being applied to a cyclic motion that is not ...

  6. Riders get stuck spinning backward when amusement park ... - AOL

    www.aol.com/news/riders-stuck-spinning-backward...

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  7. Figure skating spins - Wikipedia

    en.wikipedia.org/wiki/Figure_skating_spins

    They advanced between World War I and World War II; by the late 1930s, all three basic spin positions were used. There are two types of spins, the forward spin and the backward spin. There are three basic spin positions: the upright spin, the sit spin, and the camel spin. Skaters also perform flying spins and spin combinations.

  8. 9 misprints that are worth a ton of money. Do you have a copy?

    www.aol.com/news/2010-05-03-9-misprints-that-are...

    Penguin books in Australia recently had to reprint 7,000 copies of a now-collectible book because one of the recipes called for "salt and freshly ground black people." 9 misprints that are worth a ...

  9. Face inversion effect - Wikipedia

    en.wikipedia.org/wiki/Face_inversion_effect

    Instead of just one explanation for the face inversion effect, it is more likely that aspects of different theories apply. For example, faces could be processed with configural information but the role of experience may be important for quickly recognising a particular type of face (i.e. human or dog) by building schemes of this facial type.

  1. Related searches what makes wheels spin backwards and upside down in one person with two

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