Possible Clues:

• A half a hundred with weapons to a frightful extent
• Terrified, seeing gangster with gun
• Panicked
• Freaked out
• Frightened gangster, tooled up?
• Frightened American was first to grab weapon
• Capone with gun making you frightened?
• Capone carrying weapons caused consternation
• Concerned with wings on sea
• Gangster with a gun making you scared