you slip a GRAPHITE SHIELD ROCK up over him when hes not looking.

bart: “you seem a little nervous my dear!”

CR: “oh its nothing! This sure is a nice room .. w- what was it for again?”

bart: “oh that! yes that is easy! you see, theres three holes in this room with rocks! and these rocks needs to be planted right on the three pillars! then something nice will happen!”