Kodai Matsumoto is a Service Technician at Nikon Professional Services (NPS). In the video below, Kodai demonstrates just how quickly he can disassemble a Nikon D4, repair it, and puts it back together in about 20 minutes.
The Nikon Professional Services provides a fully maintenance service and loans equipment to Nikon photographers at major events, like FINA, BCN2013 in Barcelona.