Saturday night I brewed NB's "The Number Eight" (high-alcohol Belgian Dark). Fermentation started as normal throughout Sunday, and this morning (Monday) I checked-in on it to make sure everything was safe and sound... it was clear I needed to switch to a blow-off hose. This was at about 5:30am today, I was barely awake, and going through the motions (I've replaced the air-lock with a blow-off hose numerous times). In my exhaustion, I must not have pushed the hose far enough into the neck of the carboy, because when I got home from work today the blow off hose had fallen out of the carboy. Fortunately the kraeusen didn't spill onto my floor, but the carboy could have been exposed to open air all day - I can't know for sure. As soon as I got home, I replaced the blow-off hose into the neck of the carboy and the beer was quickly back to happily blowing bubbles in my blow-off bucket through the hose.
Assuming nothing from my dingy basement ceiling actually fell into the beer (I realize I'm pretty much out of luck in that case), do I have anything to worry about?