A visitor at the Belfast Zoo in Northern Ireland filmed some chimpanzees attempting a breakout on Saturday.  They had propped a fallen tree branch against the enclosure's wall and then climbed to the top.

The branch is already leaning against the wall when the clip starts and you see a couple of chimps making their way to the top.  One of them does escape . . . although it returned later.

Danielle Monaghan

escaped Dean McFaul what a day ????????????????