Waking up from nap screaming insane

Ly

My LO is almost 4 months and sleeps great at night without issues. Recently, he had started waking from some of his naps with a sudden blood curling scream that is SO loud and scary and it takes a few minutes to calm him down. Other naps he is fine and wakes up and just lays there cooing calmly. Anyone else experience this and know a cause??