Some black tarmac and red tarmac are having a pint in the pub
The black tarmac says: "Did you know I知 the hardest tarmac in Britain? I do major road surfaces, car parks, runways, you name it, I知 hard"
Suddenly the door opens and the green tarmac walks in.
The black tarmac breaks a sweat, freaks out and hides around the corner.
Later when the green tarmac has left he skulks back to his seat.
The red tarmac says: "What happened there? I thought you said you were hard"
And the black tarmac replies: "Yeah, I may be hard but he's a cycle path!"