He put New York Times reporter Sheryl Stolberg on the board and as the device was fired up, Stolberg appeared to levitate an inch or so off the ground and traveled in circles near his feet.
The president was overjoyed with this. "you're levitating!" he exclaimed, reports CBS.e then went to a station where plastic soda bottles are "shot" across the room using compressed air.
The bottle-rocket device is used in high school science classes for students to figure out the distance a bottle will travel. (ANI)