There is a 2.8% chance that monkeyface Gideon will show a human emotion this episode.
Hollywood cliche #288: when a female character rubs her belly she is pregnant.
So: out in the middle of nowhere Texas someone jumps in front of the train Elle is riding on, bringing it to an abrupt stop. The jumper is never
mentioned again.
Some guy who has suddenly developed facial tics decides to start a gun collection. And hold a handful of passengers as hostages.
Snipers have the train surrounded yet are never given the order to fire. Clearly they have multiple chances to make this a ten minute long episode. And as far as the "it takes one bullet to shatter the window" premise: even if this was true an order for all snipers to fire in rapid sequence would solve this non-issue.
Gideon waits until the team has exited the SUV before saying: "don't look at the train".
Crazy dude tells Gideon that he want's "something" removed. The team mulls that one over. When they see all the scars on crazy dude's arm Reid finally volunteers some useful information and the team lets him run with it.
In the end it is Reid who saves the day.