I remember a bard in our party who was supposed to sing a song to calm a group of angry goblins. But he forgot the lyrics and started making up the most absurd words. The goblins were so confused that they just sat there scratching their heads. It was a great comical relief during a tense moment. And we all still laugh about it when we recall that session.
My group had a paladin who was always so serious. One time, he had to cross a rickety bridge. He was being all cautious and noble, but then a squirrel ran across the bridge and he freaked out, thinking it was some kind of magical beast. He ended up falling into the river below. His pride was a bit hurt but the rest of us couldn't stop laughing.
A paladin I knew in a DND session tried to use his holy powers to bless a barrel of ale. He thought it would make it a 'holy ale' that would give extra strength to those who drank it. Instead, the barrel exploded, drenching everyone nearby in ale. It was quite the mess and everyone was laughing at his miscalculation.
During a mission in Waterdeep for Dragon Heist, our cleric was supposed to heal a sick person. But instead, he misread the spell and made the person's nose grow really long, like Pinocchio. It caused chaos in the town square as everyone was trying to figure out what happened. We had to run away from the angry mob while still laughing at the cleric's mistake.
One funny story is about an engineer who was presenting a new software design. He was so excited and talking really fast. In the middle of his presentation, he accidentally clicked on a wrong button and a cat video started playing on the big screen. Everyone burst out laughing.
I heard of a nursing teacher who was demonstrating the use of a wheelchair. She sat in it and was supposed to show how to move around, but she accidentally rolled right into a stack of textbooks. It was really funny.
A friend of mine was at a water park. She went on a really fast water slide. When she came out at the bottom, her bikini top had twisted in a very strange way that made her boobs look all wonky. It was super funny. She had to quickly adjust it while we all laughed.
In one DND session, a druid decided to turn into an eagle to scout ahead. But he misjudged his flight path and ended up crashing into a tree. He then transformed back into his normal form, dazed and with leaves in his hair. His party couldn't stop laughing as he tried to explain how the 'evil tree attacked him'. This simple mistake made for a really humorous moment.
I had a client who was really into magic tricks. He tried to show me a card trick while we were waiting in a cab. But he was so bad at it that he ended up dropping all the cards on the floor. We both laughed so hard. It was a great moment of just pure fun and no awkwardness at all.
One of the funniest moments in bmt stories is when trainees are learning to march in formation. Sometimes, someone will get the rhythm completely wrong and start marching out of step, causing chaos in the line. It's hilarious to watch.
I heard of a situation where a newbie at a nude beach accidentally sat on a wet towel and got up with the towel stuck to his behind. It was really funny to see him walking around trying to figure out how to get it off without making a scene.
One time, a customer accidentally set off a vibrating product while holding it in their hand, and they jumped about a foot in the air. It was quite a sight.