Anyone looking to pick up more modestly priced works of art may encounter an obstacle - a snooty gallery owner questioning you about what pieces you already own.

Choosing another multiple after four will make the four multiples to move around the spacecraft until they encounter an obstacle and stop revolving.

Whoever wants to face these consequences in the form of emigration will not encounter any obstacle.

After a period during which it's seemed that, whatever you did or decided, somebody objected or you encountered an obstacle, you're feeling a bit disheartened.

These sensors send a signal that will be reflected back when it encounters an obstacle near the vehicle.