Stimulants increase heart rate, increased blood pressure, constrict blood vessels, increased blood glucose
The open spots on the court that your opponents aren’t standing
Answer:
I did this with my friends and multiple people started looking up at the ceiling getting quite annoyed when there was nothing there. I think that the reason that people look up is to fit in and not be an outcast as well as being paranoid that there is something up there.
hope this helped - Willow