Some molecules or particles are too large or too hydrophilic to pass through a lipid bilayer. Other molecules could pass through the bilayer but must be transported rapidly in such large numbers that channel-type transport is impractical.
Vanna White Has the World's Most G-Rated Wardrobe Malfunction on 'Wheel of Fortune'. by 11:56 AM PST, December 11, 2015. Playing Vanna White Has the World's Most G-Rated Wardrobe Malfunction on 'Wheel of Fortune'. Vanna White found herself in a sticky situation during Thursday's Wheel of Fortune. While walking across the stage, the hostess, unbeknownst to her, brought part of the set with her when a prop gift got caught on the bottom of her dress.
Wardrobe malfunction. A wardrobe malfunction is a euphemism for accidental exposure of intimate parts. It is different from indecent exposure or flashing, as the latter ones imply a deliberate exposure. There has been a long history of such incidents, though the term itself was coined in the mid-2000s and has become one of the most common fashion faux pas.