He said he was 'worked to the bone' during his seven week stint with the company and could regularly walk more than 16km as he rushed to find orders in the 800,000 square foot distribution centre in Swansea.
"I've never done a job like this before," Littler told the documentary team.
"The pressure's unbelievable."
Amazon warehouse staff are reportedly armed with handheld scanners which tells them the quickest route to collect their next item and also counts down how long it should take them to get there.
But an Amazon spokesman has denied the American company places unreasonable expectations on its employees.
"The safety of our associates is our number one priority and we adhere to all regulations and employment law," the spokesman said.
"Independent legal and health and safety experts review our processes as a further method of ensuring compliance."
news.com.au 26 Nov 2013