Sheldon: It's yout fault!
Sheldon: You've infected me! I hope you are enjoying this... Vanquished my two-decade dreams.
Sheldon: Visiting the CERN was a unique opportunity and I've got trapped in this appartment with you and this virus! What could be worse?
Penny: Happy vallentine's day!
Sheldon: My mother was right! Hell indeed exists!
Penny: Bazinga!