Footage filmed by escaped inmates shows how they used a bunk bed leg to break out of a maximum security prison in the US state of California.<br /><br />The trip had cut through a metal screen and the video shows how they disappeared into a vent.<br /><br />The escapees climbed through shafts, with one of them giving a hearty thumbs-up as their jail break succeeds. <br /><br />The video shows the inmates on the roof of the jail but does not show how they got to the ground.<br /><br />The men were eventually captured after a week-long manhunt. Serious questions are now being asked about how the phone was smuggled inside, and whether policies have been changed since the jailbreak.<br />
