Great references, step-by-steps and detail shots of Torbjörn from Blizzard’s Overwatch.
Via:
http://www.overpwn.com/news/2-overwatch-origins-blizzcon-2014-panel-recap
http://us.battle.net/overwatch/en/media/
http://blizzard.gamespress.com/en/BlizzCon-2014-Overwatch-press-kit