From "Goosebumps: The Barking Ghost (#3.7)"
[after turning back to normal
] Are you alright, Mickey?
[sees Mickey acting strange
] What's with your brother?
Who knows? He's always been a little weird, if you ask me.
[Mickey scratches his neck in an odd fashion
Come on, let's get out of here.
[as he and Fergie leave, little do they know, Mickey's cheeks puffs up as he eats an acorn, acting like a chipmunk
[in a chipmunk's body
] Hey, Cooper, you weasel, don't leave me here! What am I gonna do! You gotta help me, Cooper - this isn't funny anymore!