What did the man do last weekend?

W: Did you have a nice weekend?
M: Yes, but I was very tired at the end of it.
W: Why? Did you go running or swimming?
M: No, I went mountain climbing.
W: Who did you go with?
M: I went with two people.
W: Your sisters?
M: No. My two friends, Dom and Daisy. They often go to the mountains.
W: Was the weather OK?
M: Well no, that was part of the problem. It didn’t rain but...
W: Was it too cold? Did it snow in the mountains?
M: No. The problem was the fog. We couldn’t see.