People gave you good answers already, so I'm here to give you several goofy ahh suggestions.
Whermst? (What, when, who, why, how simultaneously)
Ooohhh crib.
Fridgesicles.
Oh fiddlesticks, what now?
Oh poop.
AHH! Goovy cushions!
Ratati~ Ratata~ Ratato~
In the name of bucking palace, what...