In past games, I used plenty of physical dangers. Incoming volley of arrows, giant boulder, a huge sword, a horse charge, a fireball... but I have no idea on how to make them roll anything else than Defy Danger with Dex or Str. Since most of them don't have much Dex, I'd like to make them use their mental stat and be like, "Finally, I can roll with my Wis."
I just have no idea how to describe an imminent danger that would threaten their minds.