An old, unshaven man caught Jacob’s eye. He squatted by the road, hopped up and down and pointed at the ground between his legs, shouting in the dust kicked up. by the crowd. Jacob slowed down as he approached.

The man wore a fur jacket and hand-sewn leather breeches. His shouting and jumping grew more frenzied as Jacob neared.

“Doo-Doo!” He screamed, as if delivering a terrible insult. Froth appeared on his lips and he again pointed to the ground.

“Doo-Doo! Doo-Doo!”

Puzzled, Jacob slowed the car almost to a stop.

Something flew past his face from the left and cracked against the window on the passenger side. There was a bang on the roof and within seconds a fusillade of small pebbles was striking the car, making a drumming that pounded in his ears.

He ran up the window on his left side, yanked the car out of automatic, and surged ahead. The flimsy metal and plastic of the runabout dimpled every time a missile struck it. Suddenly there were faces leering in Jacob’s side windows; young tough faces with drooping moustaches. The youths ran along, the side of the car as it sluggishly accelerated, hammering on it with fists and shouting.

With the Barrier only a few meters away, Jacob laughed and decided to find out what they wanted. He eased off a trifle on the accelerator and turned to mouth a question at the man who ran next to him, an adolescent dressed as a twentieth-century science fiction hero. The crowd by the side of the road was a blur of placards and costumes.

Before he could speak the car was shaken by a jolting bang. A hole had appeared in his windshield and a burning smell filled the little cab.

Jacob gunned the car toward the Barrier. The row of barber poles whizzed by and suddenly he was alone. In his rearview mirror he saw his entourage gather together. The youths shouted as he drove off, raising fists from the sleeves of futuristic robes. He grinned and opened the window to wave back.