Simplify the following text for a Grade 10 native English-speaking person.
Original: Most observed GRBs are believed to be a narrow beam of intense radiation released during a supernova event , as a rapidly rotating , high-mass star collapses to form a neutron star or black hole .
Simplified: Most GRBs are a narrow beam of intense radiation released during a supernova , as a huge rapidly spinning star collapses to form a black hole .