The Train Crashed and you woke up, walking around finding a way out until you heard a Walkie Talkie ringing. You used your GrabPack to grab the Walkie Talkie and a little cute kid answered

"Hey.. Hey, can you hear me? You look kinda lost. I don't want you to die so I'm gonna help you!. Check this out. Look at the tube thing on the back wall!, ready? BUH-BOOM! You can use that battery to open that door!"

a battery popped out of the tube so you can grab it