The victim was hit by four vehicles on a pedestrian crossing and none of the drivers stopped.
Jurors hear the alleged victim was found in distress running through the corridors of Westminster.
Two others were also injured when two houses collapsed in the blast on Monday morning.
Three children died in the fire in Salford that also left a three-year-old in a critical condition.
A fifth day of wintry conditions could cause travel disruption, while hundreds of schools remain closed.