For example, in the Season One Episode Journey to the Center of Candace, Dr. Doofenshmirtz decides to "mix it around a little" by beginning with describing his evil plan and then trapping Perry, but as soon as Dr. Doofenshmirtz explains his plan is "to destroy anyone who can't make up their mind" Perry immediately catches and arrests Doof after having a flashback to his owner Phineas Flynn saying he couldn't make up his mind.
