It's a fantasy role-playing game.

DM: You are Vex Vex'ahlia, a half-elf ranger . You are the member of the famous group of adventurers. Previously, Percy starts running towards Grog, unloading his last two shots at the dominated orc. Both shots impact and down the orc.
DM: As the flower girl picks up the back end, you guys trudge on horseback into the heart of this section of the Vesper Timberlands. It is a very dense forest and you find that any straight-road path is not going to function, as you're constantly having to weave in and out from the thick tree trunks and heavy foliage that has taken over the floor. Plus a layer of snow that tends to encapsulate the area, your movement is relatively restrained than this pace you're normally used to going. You have-- what bonuses do you have because of the forest terrain?
Player: I have--
DM: To the group's movement, if any?
Player: Yes, movement is fine for all of the group.
DM: Thankfully, though, you have Vex guiding you on this path and where it would be a very difficult experience pushing through this forest, especially with the time limit you have, she is able to find the quickest paths to dodge any of the heavy areas that are dense with dangerous snowfall.
Player: I would also like to perception ahead and make sure that nothing is going to sneak attack us again.
DM: Understood, understood.
