Roommate Agreement T-Shirt
An officially licensed charcoal The Big Bang Theory tshirt featuring a comic-style picture of Sheldon along with an appendix from the Roommate Agreement. The rule in question, Appendix C - Future Commitments Rule #37, requires one friend to take the other to the Large Hadron Collider in Switzerland if they ever get the opportunity to go.
When Leonard was given the opportunity to visit the CERN Super Collider, Sheldon wanted Leonard to take him instead of Penny. Sheldon tried in vain to convince Leonard and, when Penny backed out because she was sick, Sheldon was excited to go. Until he came down with the flu, too. In the end, Leonard took Raj to Switzerland.
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