It isn't just GetUp! director Simon Sheikh's collapse on live television that it is trending on Twitter - Liberal MP Sophie Mirabella's reaction to the incident on Q&A has drawn just as much attention.

Sheikh slumped forward as panellists on the ABC program discussed the carbon tax and climate change, with his head making an audible thud as it hit the desk.

Simon Sheikh collapses on to the Q&A desk as Sophie Mirabella watches. Credit:ABC

Fellow panel member Climate Change Minister Greg Combet and members of the show's crew went to Sheikh to offer assistance.

However, it is the reaction of Mirabella, who was seated next to Sheikh, that has Twitter users commenting.