Watch this biographical news piece on Sri Chinmoy which includes a partial dumbbell bench press of 1000 pounds.
Sri Chinmoy followed the strongman standard of moving a weight far enough to displace a sheet of paper from beneath a weight. If you look closely, you will see the weights clearly slide up the racks.
This piece gives a succinct overview of Sri Chinmoy’s motivation as well as a window into his other activities, like music.