So, let me tell you about my official MBLD today. It started off pretty poorly when I had to keep rechecking cubes during reviews to remind myself what my memo was. Additionally, the scrambles were absolutely horrible - twisted and flipped pieces and cycle breaks galore. When I went to retrace my memo over all the cubes (I was going very safe since I was hoping for an n/n solve) I found that on over half my cubes I had memoed at least one wrong letter, and I had to update a bunch of images.
When I finally started execution, I discovered that I had put on my sight blocker upside down, so instead of the paper resting on top of the harmonica holder and being held in place by tape, the weight of the paper quickly pulled the tape off one side of the holder and dropped the paper on me as I was solving. I kept trying to tape it back up, but about once per each cube it would fall off and I would have to stop executing to stick it back up.
As I continued, my phone started to vibrate continually, since it's set to keep buzzing until I check the message (which I obviously was not allowed to do while solving). Soon after that, a big machine started making a bunch of noise in the hallway outside, which wasn't really that distracting but was just one more annoyance.
When I reached the final group of cubes, I couldn't remember the corners on one, so I skipped it and came back to it at the end. I spent at least 30 seconds trying to remember, and I eventually came up with everything but the first letter pair. After about another 90 seconds, I finally came up with that pair and was able to finish my attempt, which I had anticipated taking 45-50 minutes, in over 58 minutes.
And after all that, somehow I still managed 11/13. One cube was off by a 3 cycle of edges, and the other was a total mess since I got lost when the paper fell on me.