<P> Posehn performed the voice of Gibbons , a tiny man , on several episodes of the Cartoon Network 's Tom Goes to the Mayor ( 2005 -- 2006 ) . He also appeared in the 2005 pilot for The Showbiz Show with David Spade , in a segment called `` The Nerd Perspective '' , in which he gave a scathing criticism of MTV and its declining quality . He also played a mortician in several episodes of Comedy Central 's Reno 911 ! . He was featured on the 2005 documentary series The Comedians of Comedy on Comedy Central and Showtime . He was in a 2007 episode of the improv series Thank God You 're Here on NBC and was a celebrity judge on the revived 1970s game show The Gong Show with Dave Attell ( 2008 ) , on Comedy Central . He co-stars on The Sarah Silverman Program with Steve Agee as a gay couple who is friends with Silverman , and also wrote the season three finale `` Wowschwitz '' . He played himself in the episode `` Spagett '' of Tim and Eric Awesome Show , Great Job ! , appeared at the Comedy Central Roast of Bob Saget , played the role of a physically disabled man ( Scooter Man ) in the second season 's premiere episode `` Slip of the Tongue '' of Californication ( 2008 ) , on Showtime , and played Dethklok 's second manager in the Metalocalypse episode `` Dethsources '' , he also wrote the episode `` Fatherklok '' . In 2007 he joined the first season of the MTV sketch comedy series Human Giant , as a writer and performer , and voices Glen Furlblam , the biggest fan of Dr. Two - Brains on the PBS Kids animated series WordGirl . In 2012 he co-wrote the fourth season of Metalocalypse . Since 2013 , Posehn has appeared in the recurring role of Bert on The Big Bang Theory . </P>
<P> Posehn performed the voice of Gibbons , a tiny man , on several episodes of the Cartoon Network 's Tom Goes to the Mayor ( 2005 -- 2006 ) . He also appeared in the 2005 pilot for The Showbiz Show with David Spade , in a segment called `` The Nerd Perspective '' , in which he gave a scathing criticism of MTV and its declining quality . He also played a mortician in several episodes of Comedy Central 's Reno 911 ! . He was featured on the 2005 documentary series The Comedians of Comedy on Comedy Central and Showtime . He was in a 2007 episode of the improv series Thank God You 're Here on NBC and was a celebrity judge on the revived 1970s game show The Gong Show with Dave Attell ( 2008 ) , on Comedy Central . He co-stars on The Sarah Silverman Program with Steve Agee as a gay couple who is friends with Silverman , and also wrote the season three finale `` Wowschwitz '' . He played himself in the episode `` Spagett '' of Tim and Eric Awesome Show , Great Job ! , appeared at the Comedy Central Roast of Bob Saget , played the role of a physically disabled man ( Scooter Man ) in the second season 's premiere episode `` Slip of the Tongue '' of Californication ( 2008 ) , on Showtime , and played Dethklok 's second manager in the Metalocalypse episode `` Dethsources '' , he also wrote the episode `` Fatherklok '' . In 2007 he joined the first season of the MTV sketch comedy series Human Giant , as a writer and performer , and voices Glen Furlblam , the biggest fan of Dr. Two - Brains on the PBS Kids animated series WordGirl . In 2012 he co-wrote the fourth season of Metalocalypse . Since 2013 , Posehn has appeared in the recurring role of Bert on The Big Bang Theory . </P>
who played bert in the big bang theory
who played bert in the big bang theory
Posehn
Posehn