When Howard and Bernadette talk at the Cheesecake Factory, Bernadette puts her apron on the table. The way it is folded keeps changing between shots.
Howard tells Penny that characters in World of Warcraft are able to have sex with each other and that he did "the cyber-nasty" under the "Bridge of Souls". Neither can the character actually have sex nor does a "Bridge of Souls" exist.
Hydrogen sulfide is toxic to humans and most other animals by inhibiting cellular respiration in a manner similar to hydrogen cyanide. When it is inhaled or its salts are ingested in high amounts, damage to organs occurs rapidly with symptoms ranging from breathing difficulties to convulsions and death.
Sheldon would not have used this as he would risk killing people.
Sheldon would not have used this as he would risk killing people.
After the explosion in Sheldon and Raj's office the smoke would have almost immediately caused the fire alarms in the college to go off.
Bernadette tells Howard that he never "made the move" with her. Yet, the first time they dated Howard was trying to unhook her bra while they were in bed in "The Gorrilla Experiment."