GOOD PRANKING JOKE?!?! 10 POINTS TO BEST ANSWER?!?

ok well today at school (im in 6th grade) and i was called to the front office, to pick up a note. i was called over the intercom, and since my brother goes to the same school as me (he is in 8th grade) he heard it, and so did his friend. but they didn't know i wasn't in trouble. What would be a good way to prank my brothers friend by making him think i got in serious trouble? 10 points to best answer.