Burns' office. The player also sees him in Level 7, where he provides the player with a map containing all of the nuclear waste barrels he buried all over Springfield (although due to Homer saying "aliens", Mr. Burns initially thought he was going to use them to kill off illegal ...
Not even Homer spray-painting "I AM HOMER SIMPSON" on Burns' office wall was sufficient to get Burns to remember Homer's name, this incident only resulting in an altercation. In addition, Mr. Burns, when planning his Sun Blocker plan shortly after firing Smithers, and while literally ...