Hours after a right-wing extremist killed 49 worshippers at two mosques in New Zealand's Christchurch, a survivor of Indian origin today recalled how the heroism of an unidentified man in their midst prevented the incident from turning into a much bigger tragedy. "We were in a small mosque - measuring about a hundred square metres - and when you have a gunman coming in and opening fire in such circumstances, your heart beats faster and you can't feel anything," Faisal Sayed, who has been living in New Zealand for over 10 years, told NDTV. "But a friend and I witnessed this gentleman creep up behind the shooter and hold him until his gun dropped."