This is how I look when I try to read Japanese characters! 😉
But in reality it was a part of funny “propaganda” for construction workers stating: “when in doubt check again!”
The most interesting here is what is missing on this picture. The character 迷 for 迷う（まよう）being lost, going astray with on-reading メイ and used in such conjunctions as:
迷信（めいしん） lit. the belief that went astray = superstition
迷彩（めいさい） the colors that mislead = camouflage.