Probably the most stable dream I've ever had

I was a teacher in this classroom of about 25 students. I don't know what the intention was, but I went up to each student and held some number of fingers right in front of their face, held it there for a decent pause of about 3 seconds, and then said the number, and went to the next student. I went to almost every single student and did this, which is such a bizarrely stable dream to be able to carry out such a long-ish repetitive process so close to completely through the entire class like that.