During my prep period today I was walking from the office to my classroom after having copied some papers. Coming towards me was a student busily texting on his phone.
There's a drink machine near the end of the building, as just as he passed the machine he turned right--and walked straight into the wall, the edge of the building. I kid you not, he walked directly into the wall. The corner he meant to turn was perhaps 4 feet beyond him.
He wasn't supposed to be on his phone anyway during class time, but rather than call him out for that I just said to him, "There's a wall there."
He looked at me and said, "I was on my phone."
I replied, "I know." And continued on to my class.