Possible Clues:

• Scotsman fighting bear: it's gruesome
• Boatman catches a crab — strangely shocking
• Horrible, unpleasant experience having vehicle impounded
• Dark vehicle borne by horse
• Ghastly horse circling vehicle
• Black taxi in Hackney, say
• Spooky horse seen around hackney carriage?
• Weird and horrible experience involving black vehicle?
• Ghastly creature pinching taxi
• Gory, morbid