Fiction: Memory Bus

The memory bus had a silver and white outer shell and a driver decked out in a crisp, gray uniform and gray cap. After studying the bus for a bit, Vincent got on. His heart was thumping so loud he swore everyone heard it. He pressed his chest and released a short breath.
    Once inside, he was immediately transported into ten-year-old Vincy and sitting beside his mother. Dawn's early light filtered in through the many open windows. A shiver ran up Vincent's body. He noted the watch on his right wrist: 8 am, seven more minutes and the accident would occur.
    Two young boys with black izzards on the front of their hoodies were playing games on their phones. After awhile, they took out staple guns and began shooting at each other, moving around the bus and climbing over seats and people. The other passengers complained for them to stop but they kept on, laughing and shouting, sending nails here and there. Staple nails went here and there but one ricocheted off a metal part of a window and drove into Vincent's mother's head who was asleep. Vincy had pulled his mother to his side but the nail had struck her in the head and killed her instantly.
    When the bus screeched to a halt, the boys with their staple guns fled. Alerted by Vincy's shouts, the few passengers started crowding around Vincy and his mother.
    Vincy was transported back outside and standing in front of the bus. This fifth time made it clear — there was no effective way to get an outcome in which his mother lived. The only sure way was to never let the two picaroons to step inside the bus.
    But Vincent could not change the past and even if he was able to do so, it wouldn't alter anything as the memory bus could only run within and did not affect the outside world.
    Vincent exhaled. He got the proof he needed. Now he could finally let go and move on.

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This month's Words for Wednesday's prompts are provided by messymimi over here. This week's prompts are: shell, deck, chest, proof, dawn, effective and/or brabble (a loud, dumb argument), izzard (the letter z) and picaroon (a scoundrel).