Say any number and Yash Shah can rotate his limbs and neck by that angle. Surat-based 18-year-old Yash, who has recently taken class-12 examinations, learnt these flexibility techniques just by watching videos and television and he aims to register his name in the Guinness Book of World Records. Due to his jaw-dropping flexibility skills, residents of Surat have begun calling Yash as 'Rubber Boy.' Dr. Rajiv Chaudhary, a medical practitioner, claimed that Yash suffers from a genetic disorder which results in extra-flexibility of ligaments.