I came home to find this video on my computer, it seems the rat babies were acting up while I was away!  Hope you enjoy it.  And yes, for some reason the chroma keying screwed up and parts of the rats became temporarily transparent.

All letter OC ponies created or reimagined by The Marefriend: http://www.fiverr.com/heathersmoo

Music used:
20 Percent Cooler (original by Ken Ashcorp) by Lavender Harmony: https://eqbeats.org/track/1247
The Cutie Mark Crusaders Go Crusading by William Anderson: https://www.youtube.com/watch?v=JOY69M6-f5I
Ultimate Sweetie Belle by Alex S: https://www.youtube.com/watch?v=r2Xz8ByceWk

Images used:
Vector - School Groups by The-Mystery-Of-Doom: http://the-mystery-of-doom.deviantart.com/art/Vector-School-Grounds-294405567
Open Doors - Corpulent Brony by The Looney Turtle: http://thelooneyturtle.deviantart.com/
Closed Doors - Corpulent Brony by The Looney Turtle: http://thelooneyturtle.deviantart.com/
MLP Hallway hospital by SkullCroos: http://www.deviantart.com/art/MLP-Hallway-hospital-330527504
Soviet Canuckistan Flag by Yossarian: http://en.wikipedia.org/wiki/File:Soviet_Canuckistan_Flag.png
Newfoundland Map by David J Gagnon: http://members.kos.net/sdgagnon/nfa.html
Double Heart Cutie Mark by noxwyll: http://lazingabout94.deviantart.com/art/Double-Heart-Cutie-Mark-326407019
The National Atlas of the United States of America by US Department of the Interior US Geological Survey: http://ds-lands.com/photo/countries/united-states/04/
AiP Mouse by SWFlash: http://mlp.wikia.com/wiki/File:AiP_Mouse.png

Sounds used:
MAILBOX by BeachWare: http://sounds.beachware.com/things/mailbox.htm