Hall of Infinite Doors

The toll man allows you passage and you continue on your way. As you walk you notice clouds forming above your head. Flashes of lightening illuminate these clouds but instead of emitting thunder you hear a deep thunderous voice coming from them. It says:

"You have traveled so far, sacrificed time, energy and now money to try to reach the end of the hallway. Do you know what it holds? Do you know why you feel so compelled to continue? I will provide you with four opportunities to end this pointless journey and accept the grim reality that you shall never reach the ending."

The walls then open up in four places, each orfice glowing with bright blue light. You can hear the sound of little childrens voices chanting from each opening, chanting a different rhyme from each.