But what happened next – what those terrifying-looking bikers did for the next three hours on that highway – was something no one could have predicted.

The biker who’d threatened the crowd walked toward my son, but instead of trying to grab him or yell at him like everyone else had been doing, he did something that made my heart stop.

He laid down on the asphalt next to Max. Just laid down on his back on the highway, about three feet away from my screaming son, and started…

Max had been doing so well that morning. We’d been driving to his special therapy center in Boston, a three-hour trip we made every month. He’d had his headphones, his tablet, his weighted blanket – all the tools that usually kept him calm during long rides.

But forty minutes from our destination, everything went wrong.

A motorcycle