From Redditor u/Raging-ball-of-fury:
My little brother is a sleepwalker. We’d gotten an alert and saw that he had snuck out of the house while still asleep.
My sister said she heard someone talking just outside the door. I went to look and saw my brother [sitting] on the porch couch apparently having a conversation with our grandpa, despite being alone. She says he was saying, “I love you” and “I’m going to miss you.”
My dad got him back inside the house without waking him up, and nobody gave it much thought. Until a couple hours later, when my uncle called telling us my grandpa had passed while asleep.
My little brother says he doesn’t remember anything, but we got it on video. We can’t hear what he’s saying too clearly, but he was definitely talking to someone, and he sure as heck said, “I’m going to miss you” at least twice.
TL;DR: My little brother is a sleepwalker. One night, he walked out the door where he was seemingly talking to himself. He said he was going to miss our grandpa. Later that night, our grandpa passed. My little brother doesn't remember anything.