Spike Switch

Description
The Spike Switch is a League 1 trap which triggers when approached from the left or right, and heavily damages the player.

Strategy
The most obvious usage of Spike Switches is to place them directly at entrances, such as on the floor Cat God is on, to damage the player as soon as they enter. However, they can also be used to encourage players to avoid sections of the map, since they are one of the only traps which can be seen before entering a room. This fact can also be used to bait players into traveling vertically in an attempt to travel around the Spike Switch, which can be used to lead them into other traps.

To avoid Spike Switches, the most obvious choice is to just go around them. They won't be triggered if you travel into them vertically, so just go up or down a floor, then come back to them. Be careful, though. Don't travel to another floor if you think it might be trapped. Remember, going through Spike Switches is still an option if there isn't a better alternative.