Yes very off topic but it made me giggle so I am sharing

Laugh for no reason and at random times. Don't explain yourself either when someone asks you why you are laughing. Just shrug it off and start laughing at something else. Alternatively, Make up inside jokes that only you know and don't share them with anyone. When someone asks you why it's so funny, just tell them that it's an inside joke.

Make animal sounds. People can get really annoyed if you sneak up behind them and make an animal noise. If someone is yelling at you or scolding you, make a questioning sound in return.

Hug random people. Just spontaneously run up to a person and give them a hug and tell them that you are so glad to see them and that they are your best friend ever. And after that, right in front of them, do the same thing to some other person.

Sing along to everything. Especially the annoying or little-kid songs. If they are listening to their iPod, help yourself to one of their headphones and start singing along to the song (if you're tone deaf this works really well). Remember, you don't have to even know the words to the song, just make them up as you go along – the dumber your lyrics the better! And, for bonus points, if you are watching TV, sing along with all of the commercial jingles. You could also sing something over and over to the point where no one can stand it anymore.

Make prank phone calls. Call your friends during class to "see if their phones were off like they were supposed to be". Call random numbers in the phone book and ask them if they would like to share a turkey sandwich, and don't worry, there's no mustard. The old refrigerator running call is a definite option too, because it's the most annoying in the book! Call one place and then hang up, and keep calling like that. They will be driven insane by the non-stop ringing.

Gawk at something non-existent on the top of someone's head. When you're having a normal conversation with someone, suddenly open your mouth slightly and stare at a point just over their head or right on top of their head. If they touch their head nervously and ask "what?" just stifle pretend laughter and shake your head and return to the conversation. To make it even more annoying, keep doing it throughout the day at inappropriate times.

Stare at people. This freaks a lot of people out.

Sing random songs at random times. for example: start singing Jingle Bells during a car trip. This is very annoying and will annoy anyone.

Refuse to go to bed unless the cat or whatever pet you have reads you a bedtime story.

Ask people what gender they are.

If you are in a chat room with six people at least just start typing random letters to them. They will go nuts.

Ask the person behind the counter(preferably if they are wearing a work uniform!), "Hi, do you work here? Or are you just wearing that uniform because it's cool?" Or simply ask them, "Wow! Where ever did you get that outfit? If I had an outfit like that, I would wear it everyday!"

Make strange sounds like an ambulance, the sound of a performance or even echo sounds.

Hope this made you giggle too 😆