Character mistake: When Scorpio hijacks the school bus near the end, he says something to the effect that they are going to take Sir Francis Drake Boulevard to the Santa Rosa Airport. Unfortunately, Sir Francis Drake Boulevard doesn't go anywhere near Santa Rosa, it heads west through Marin County and ends up near Pt. Reyes. They should have stayed on the highway and kept going north to get to Santa Rosa. (01:27:25)
Character mistake: The bus driver identifies herself as Marcella Platt, but after they get off the phone, the cop who checks her out calls her Priscilla Platt.
Answer: If you watch closely, you see the killer throw him to the side and then take aim at Harry, at which point Harry shoots him. Since we don't see the kid again, we can assume he ran away as soon as the killer let him go.
Not true. Actually, Harry sees the boy, and appears to be lowering his weapon, and then blasts Scorpio... and when the bullet hits him, he is still holding the boy hostage... It is only after Harry shoots him, and he falls to the ground, that we see the boy running away.