sleep study for fiancé

Major sleep issues but the main one is when he wakes up from any amount of sleep he stays in an incoherent almost drunken Or dream like state for sometimes 45-60minutes but usually 10-15 is enough for him to snap out of it. It is so bizarre and sometimes scary. He won't remember a thing that happenes between waking up and snapping out of it later. And he will talk complete gibberish or full sentences that have no context. Sometimes he will be angry and sometimes just calm and almost like he was drugged while he slept. I don't understand!! Anyone else have this problem or a loved one with this issue? I told him today I NEED him to receive a sleep study before the wedding