Evil Spin Instructor

So I think my spin class instructor was trying to kill me today....maybe even everyone in the class. I showed up for typical Wed class only to be informed that today was an endurance ride and would be an hour vs the normal 45 min. Wait what?? An hour spin class right after the holidays? Are you mad?? It must have been a new year schedule change that I didn't know about. So there I was....already warming up on my bike...thinking to myself...well I can't get up and leave the class so I guess I'm gonna suffer through this. We continue to warm up and the instructor drops another fun bomb on us that we won't have any recovery sessions during the ride....YEAH!!! Midway thru the ride she informs us that we may start to feel a burn in our quads....WHAT??? I FELT THAT BURN 5 MINUTES INTO THE RIDE...AARRRGGGHHH!! I have no idea what it is about biking but running that long feels great!!! Biking that long is torture!!!! :)