A short-haired woman in outlandish clothes falls from a point six inches below a ceiling, and onto a hapless bystander.
"Aaaaaaaaaa!" says the hapless bystander.
"Sorry! Sorry - I -" Checking, do they speak English, yes, he's about to speak English - weird accent - "- hello, I apologize."
"You fell from the ceiling."
He speaks English with a Latin accent.
"Yes, I'm confused about that too." She still has her cane; she collects it and wobbles to a standing position, looks for a place to sit that isn't where she landed after she tumbled from his lap.
They're in a study! There are a variety of plush armchairs.
"I have no idea what's going on and yet I sense it is somehow Ashley's fault."
"I don't know who that is."
"Ashley is my husband, he's a naval captain. --If you don't know who Ashley is, why were you on my ceiling?"
"I think I didn't actually contact your ceiling per se, I think the portal opened slightly below it, or I'd expect there to be ceiling material injuries associated with the process." She looks up. The ceiling's uninjured.
"...What's a portal?"
"Uh, last year, some portals leading to other planets were discovered, it was pretty big news? This one seems to lead to the bedroom of an English-speaking human being but we already knew it was different from the others."
"...I am pretty sure I would know if portals leading to other planets were discovered."
"Is this Earth?"
"...yes," he says, in a tone of uncertainty about what the other options might be. "You're in Londinium, Anglia."
"Well then apparently you wouldn't in fact have heard of - wait, say that again."
"Where is Anglia?"
"It's an island off the continent of Europa."
"List some other countries in Europa for me please."
"Sarmatia, Gallia, Bithynia, Noricum..."
"I assume a strange dominant did not invade my house for a geography lesson."
"I do apologize about that, I tripped, I was not the intended would-be first contact party which you can tell because I'm not wearing a spacesuit. If you care to show me out at least for the time being I won't stop you. However, the portal will continue to open near your ceiling, so whenever they figure out how I got through it any followup they attempt will come through this room and I would like to go home one day."
"It's fine, I'm married to a reasonably understanding husband, I'm not going to be ruined."
"...wow. What year is it?"