Co-destruction - Use of competitor's brand to reinforce own brand
Very bold at least was the "prank" that DHL used to put Fedex (and other competitors) on spot, turning Fedex packages into DHL's slogan "DHL is faster".
https://www.youtube.com/watch?v=UeSaMNz9YWY
In reality DHL's commercial was an advertising competition, technically non supported by DHL. Free of liabilities, DHL could enjoy a rising popularity for the brand, almost 6 mi viewers on Youtube and ovation on social media and TV.












