You decide to hide just in case they're bandits. After all, if they turn out to be travellers with a cart, then you could jump out at the last moment.
The trampling of hooves comes nearer now. You can almost make out some of the words.
"Yesterday's catch was wonderful, hey, Ron?"
"Yeah, I suppose it was only cause they weren't expectin' it."
"Expectin' it? They never expect it! That's our job, Ronno boy."
"Huh. I suppose so."
They sound suspiciously like bandits. Jump out at them or wait for them to pass?