In the words of Apollo 13:
Marilyn Lovell: Naturally, it's 13. Why 13?
Jim Lovell: It comes after 12, hon.
NASA Director: This could be the worst disaster NASA's ever faced.
Gene Kranz: With all due respect, sir, I believe this is gonna be our finest hour
Technician: We've got to find a way to make this
[square CSM LiOH canister]
Technician: fit into the hole for this
[round LEM canister]
Technician: ... using nothing but that.
http://youtu.be/jpAbA65pSac