What the hell is wrong with drivers in Manitoba?

I was driving east on Hwy 1 headed home for Christmas break. 5 or 6 black/dark blue SUVs with emergency lights flashing were approaching from behind me quickly so I pulled over. Which is what you're supposed to do. The people behind me on the road continued driving and passed me at the same time the emergency vehicles were passing me. Do people here not know that it is the law to pull over and STOP when emergency vehicles are passing you?!

On a side note, does anyone know where the SUVs were going or what was going on?