Will i get in trouble?

Today the hole cl had to participate in this thing where we'd all go into the hall and do olympic themed Quiizzes and such. We also had to do art and desgin your own olympic flag and your own olympic games. You'll then have to parade around the hall.. Once we done that we had to Stand up infront of everyone in the hall and explain to everyone on a microphone.. This was planned for after lunch. Lunch then came, but i didn't go back. I decided to go back to my graphics lesson.. That's not exactly truanting right? I've been warned if i truant agian (Leave the premisis) My mother will be fined and tooken to caught.. Is this true? I've only truanted 3 times and there allready threatening to take my mum to caught? Are they bluffing.. Besides.. that isnt exactly truanting right?