Bornean Rock Frog Extends Back Leg (VIDEO) Wake Forest University This video is under embargo. Please login to access this video. To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Caption A Bornean rock frog extends its back leg over its head, displaying a foot flag. Credit Vienna Zoo/Doris Preininger Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.