Coolant boiling out?

[Quick281]

When I got home from my ride today I noticed that my bike had boiled some coolant out onto the garage floor. I am pretty sure this happened shortly after I backed the bike into the garage and shut it off.

While riding the temperature had been at a perfect 180 and I never had any problems with the temperature at stop lights.

What could be causing this to occur?

My bike did not come with an owners manual so there may be a little bit of riding ignorance on my part. The fan came on while I was off the bike opening the garage door, so when I got back on the bike I just turned it off and backed it in.

Was I wrong in doing this? Should I leave the engine on until the fan finishes cooling the bike down?

Thanks