Some months ago I posted Smokey Nagata’s Skyline V34 GT-R in the hilarious section, this time another hilarious video by Smokey Nagata:

As you can see: he is doing his emissions test of his catalytic converter by putting Eiji “Tarzan” Yamada inside the Top Secret Supra and comparing results of before and after.
Direct link to video: ラーマン山田 の 人体実験 スポーツ触媒 編 ~あわや 排ガス中毒 死!?~ / / Rahman Yamada’s Human body Experiment “catalyst”