Going down

This morning after class, I had a few errands to do in the same building, and when I got on the elevator for about the sixth time to go from the 3rd floor to the ground level, I nearly crashed into a guy on his way out of the elevator mistakenly thinking he was at the ground floor. He apologized and I said, "I'm sorry I interrupted your trip." "No problem," he said with a thick accent. Then with a bit of a bow and a grin, he said, "Velcome aboard."