Spilling Coffee on Myself Was Only the Start

So here's my dilemma. I'm a barista at this quaint little coffee shop that most of the regulars affectionately call 'The Beanery.' It started out like any other day, just another Tuesday morning rush hour with the usual suspects, Mary who always asks for extra shots in her latte and Jake who can never make up his mind about what to order. Everything was going smoothly until I overheard one of our regulars whispering rather loudly that they needed a 'special blend' today. Now, we don't have any such thing officially on the menu, but since it's The Beanery and everyone is like family, people will ask for anything. Feeling adventurous, I mean, just trying to keep up with customer expectations, when John (yes, our regular, not his first name) came in asking for this 'special blend,' I decided to throw caution to the wind. So, instead of just getting him a regular coffee as usual, I mixed everything I thought would make it 'extra special': cinnamon, nutmeg, cardamom, and a splash of vanilla syrup. Now here's where things got interesting. As soon as I was mixing this concoction with our standard coffee blend, one too many scoops found its way into my apron front. My colleagues noticed the spill but thought nothing of it, until I began muttering under my breath about ruining John’s order because now I couldn't find clean hands to finish his drink. Feeling desperate, I attempted to clean up in the kitchen sink, only to accidentally bump a heavy box of sugar cubes that then crashed into a rack of coffee mugs. By this point, everything seemed to be going downhill. The big question here is: was my reaction to go along with John's whims just for the sake of being customer-friendly? Or should I have stuck with our standard menu and perhaps set boundaries early on about unlisted items? What do you all think? Have any other baristas out there faced a similar situation where trying too hard to please could potentially backfire?