Hi Patrick in that one he/she was yawning - I was walking along a road and for about a km or more this little darling was walking the same road towards me. Just a speck in the distance initially - when it got close enough to see me it stop, arched up and gave me a right hissing - before grabbing on to a tree. It was incredibly intimidating but there was nowhere for me to go to get out of its way so I just stood still and let it have loads of space. (300mm zoom)