Stop the Radscorpions

This quest is given to you by Seth in Shady Sands, but it is mentioned by many other NPCs there. Ask Seth to bring you to the Radscorpion Cave to start the quest. There are two ways of solving this quest.

The most straightforward solution is to simply kill all nine radscorpions. This should not be too difficult if you have Ian's help.

Reward:
 * 500 Experience Points
 * +6 Reputation

The second method requires explosives. At the entrance of the cave, there is a portion of the cave that "seems a bit weaker." If you plant an explosive here, it will cause a cave-in, trapping all of the radscorpions inside. If you are on the wrong side of the cave-in, however, you will instantly die.

Reward:
 * (Exact amount of Experience Points seems to vary depending on how many radscorpions are still alive, 300 being the minimum).
 * +6 Reputation

It has been observed that if you kill the radscorpions, then cause the cave-in, you can get the rewards for both solutions.