Surveillance video captures a man angrily boarding a school bus in Florida.Witnesses say the man was upset because several children on the bus threw crayons at his car.Students say the man had a gun.

• 监视录像录下了一名男子怒气冲冲地上了一部校车.；目击者说这名男子因为校车上有几个学生向他的车扔粉笔；所以很生气