If your little penny popper is acting fine, they'll probably be fine. "Eighty to 90 percent of the time, coins pass unobstructed," says Dr. Kettlehake. "They usually pass in less than four to five days, often within 48 hours
The answer is both. Despite most of Duchamp's work was a sort of spoof (including "N*ude Descending a Staircase"), the consequences of his trajectory represent a critical watershed in the History of Art.
