It took Nader Sabry 139 attempts before he launched a prayer mat designed to alleviate pain using NASA technology. Once the prototype was ready, Sabry used several growth hacking techniques to fuel sales. After exiting the venture, Sabry has gone onto become a growth hacking expert, penning two books on the subject and advising startups and government on innovation and growth.

In this podcast we speak to Sabry about his entrepreneurial journey and why “I don’t know” is the most important question to ask in growth hacking.