Double Dragon 2 walkthrough (SNes): Mission 74 - %nomNiveau%

Push directly, and remove the stopper below the explosive to place it on the floor below (photo 1); then as soon as the elevator starts going up, take the stopper to the left of the trigger and place it this time to the right (photo 2); when the tumbler bounces off it, take the stopper and place it all the way to the right of the platform so the tumbler goes and knocks over the trigger!