The Perfect Nap

A week after giving birth to my third child, I decided I was due for a nap. The adrenaline and newness of everything was wearing off and I was exhausted. I checked my calendar and decided a particular Tuesday would be the perfect time to take my nap. My Mother in Law would be visiting to tend to my toddler and my husband would be working from home to intercept any inevitable interruptions.
When my scheduled nap time approached I made sure everything was ready. The baby was well fed, my toddler had plenty to do. I hadn't had any caffeine all morning. I was ready for a good 2 hours of sleep. It was perfect. I crept into bed and quickly drifted off to sleep.
Rewind my story to three years ago when we looked at our house while house shopping. We noticed a large field behind our house that was connected to the nearby high school by a small path. We asked the existing home owners if much noise came from that field. The woman lied and said, "not at all." After purchasing the house we were shocked that following August when the High School Marching Band started using that field sporadically for practice. Since then we've spent thousands of dollars upgrading the windows on the back side of our house to try to block out some of the noise.
Back to my nap, you've guessed it. About 20 minutes after I fell asleep, just long enough to really be out of it, the band started up. Not the whole band, mind you, only the percussion section. I jumped awake and stumbled downstairs to tired to even cry.
Next time I'll have to remember to cross reference my calendar with the practice schedule of the band to choose my nap time.