Night terrors?

C&G <3 • Whelp we are a comfy family of 4

When can night terrors start? 2x now my son has woken from a dead sleep just with this blood curdling scream. NOT hunger, no firm stomach from gas, no dirty diaper, just dead sleep and boom awake screaming! Its scared the shit out of me both times!

Is this night terrors!? Has anyone else experienced this!?