This is the hilarious moment a first-time dad was left hyperventilating in shock when he and his wife discovered they were expecting twins during their first ultrasound. Sierra and Samuel Singleton, from Palm Beach, Florida, were feeling anxious heading into their first appointment, not knowing what to expect. But as the examination began, their nerves ramped up when the ultrasound technician said to the couple calmly, "Looks like there's two babies in there." With Samuel, 27, taking out his cellphone to record the shock of the moment, Sierra, 26, then let out a huge "Whaaaat?" in amazement. Then, as the scan went on, Samuel could be heard hyperventilating at the shock, with his "jaw on the floor," Sierra said. The moment took place on February 28, and Sierra later shared Samuel's clip on social media, where the clip immediately went viral with millions of views.