Mubarak was first put under house arrest in February 2011, after he was ousted by the mass popular protests of the Egyptian revolution. He later landed in prison.
A video of the transfer is embedded below. If you skip to about 4:30, you can see the man who ruled Egypt for three decades being wheeled out of the helicopter and placed into an ambulance. I can't quite make him out myself, but Jon Williams of ABC News says he's wearing a white track suit and sunglasses -- classic Mubarak.
And here, via BuzzFeed, is an animated gif of Mubarak's helicopter leaving the prison that held him for months and that many believed might become his permanent home.