21. Distract him when he's packing so that he forgets his cello, Beyoncé.
22. Tell him you know how to play cello, then make screeching sounds. Tell him it's a new style of music ( submitted by @hawkclaw22 ).
23. Tag Avi.
24. Offer him a French cheese plate, give him plastic food instead.
25. Read aloud all of his old tweets.
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5 Ways to Annoy Pentatonix
FanficNOTE: THIS IS NOT MEANT TO OFFEND/RIDICULE THE MEMBERS OF PENTATONIX. So I was bored, and decided this might be a fun idea to do. I'll update every 50 reads. If I've left any good ones out, be sure to let me know in the comments. x