Super Fast Heartbeat Fast Heartbeats??

Fast heartbeats?? - super fast heartbeat

I thought he has been doing the last week
Last week I was sitting on my sofa with some friends in front of the TV and nothing, my heart started beating super fast and very heavy pounding. My eyes were wide and worried, but also, for 5-10 seconds. This was not just a little faster than normal heartbeat was very fast. Can someone explain what's going on? Should I a doctor or if people make an informed idea of what he have?