Where I live you can be fired without reason for up to three months of your employment. I started working at a swim school (I would love to share the name and shit on them and the management but I don't want to get into legal trouble)
I was there for about 2 and a half months, during the busy period, then fired for no reason. I had just turned 17 when they fired me and it kinda broke my heart cause I loved the kids I worked with. Anyways screw you guys.
The only real reason I could think of was because I asked for a shift off because I was in so much pain I couldn't stand. Oh yeah and they fired me less then an hour before my shift started, over email.