Don't see how you could be. But, why post something that makes you worry about? Did you show your parents this picture and ask them this question?
I posted a picture of me and my friend vaping it was off school property and not during school hours could I be suspended still??
You could be? They are not interested in differentiating. It is like this, if you sit under palm tree and drink only juice? They would assume you're drinking toddy.
Depends how old you are, they don't know if it was nicotine or the trick smoke. U should be good. Don't admit to anything if they can't even see what it was.
I smoked on school property (a few times) during off hours, while i was bike riding xD .