Thick as a Brick
The pub landlord finds the young man lying in the road and when he comes to he claims to have been attacked although for obvious reasons doesn't want to call the police.
So the good samaritan landlord helps him on his way only to discover the truth when he discovers some minor damage to his vehicle and checks the pub's CCTV.
But a good advert for Mercedes, the Pheasnt Bar in Drogheda and Jethro Tull whose album 'Thick as a Brick' was a big hit around 40 years ago.