The Japanese painted a decoy B-29 with a 300-foot wingspread, so scaled that it appears to be flying at several thousand feet

From a great altitude the decoy gives the illusion of a B-29 in flight with flames streaming from its port inboard engine. The Japanese figured other planes would drop down to investigate and become targets for heavy concentration of flak.

that's genius if it worked

https://www.theatlantic.com/photo/2016/04/bamboo-bombers-and-stone-tanksjapanese-decoys-used-in-world-war-ii/480186/