Related Clues:

• Hit hard
• Loud punch
• 'Ker-bam!'
• Hit upside the head
• Comic-book punch sound
• Sock
• Smack hard
• Explosive sound
• Gunshot sound
• Sound of a sock
• 'Wham!'
• Hard-hitting sound
• 'Bam!'
• Hanoi Hilton resident (Abbr.)
• Punch sound