Related Clues:

• Firecracker that fizzles
• "File not found," for example
• Bug, perhaps
• It may be costly
• Commit a blooper
• Shortstop's blunder
• "File not found," e.g.
• Jim Carrey often plays one
• Misapprehension
• Bloomer
• Jackass
• Ineffective firecracker
• 'Does not compute'
• "Oopsy!" evoker
• Cracker that won't crack