Just deny deny deny.
I remember one time back in...grade 11 or 12? Can't remember really, but I was out skippin class (went to the "washroom") making out with this hot ass italian chick in the stairwell, then the principal and vice principal came, booked us, and then told her to go back to class.
The principal asked me what my class # was, and me being the way I am said "I don't know" (and i seriously didnt know the NUMBER lol). She thought I was being a dick, so she took me to her office. So I'm walking between the principal and the vice principal, high as a fucking kite. Get to the office, I explain the situation, but I know my teacher's name, not the room number. Before she sends me back she says "I think you need to go home." That's when I realized I must have looked baked outta my fucking mind, so I did some quick thinking, and realized the sun was shining on my face from the window; I put my hand up to block the light, and then pulled the straightest face ever and claimed "The sun was making me squint."
And then I walked back to class.
Boom.