“Many folk beliefs went beyond merely avoiding the rainbow’s spiritual power [a rainbow was believed to harm anyone who pointed to it] — they try to manipulate it. […] Children in Staffordshire, England, attempted to [break the power of rainbows to harm a pointing person] by crossing a pair of sticks or straws on the ground and placing a stone or two atop them, the goal being literally to cross out [the power of] any rainbow they saw.”
— from: Raymond L. Lee, Jr. and Alistair B. Fraser. The Rainbow Bridge: rainbows in art, myth, and science. Penn State University Press and SPIE Optical Engineering Press, 2001.