A Chinese man used his smartphone to record cactus flowers blooming over a 96-hour period.br br The incredible time-lapse video, shot in Changsha City in southern China's Hunan Province and starting on May 21, shows five white flowers blooming out of a potted cactus.br br According to the filmer, he closed the curtains, turned on a lamp and then used his Mi 4 phone to record the blooming process for four days straight.