Best way to implement traps on a tile?

[TungstenShark]

I want to place a trap on tile but have something which will stop a player from moving further so it can resolve. Like they had run up against a door or wall but obviously not this and obviously nothing visual to the players. What is the best way to "trap" a tile on the map?

[Sulimo]

There is a Pit Trap occluder.

See video 13 here.