Maybe they have trouble finding a place that suits the old person's taste and health needs. That could lead to some funny discussions and compromises.
One funny thing could be when the story has animals behaving like humans. Or when the ending is completely unexpected and makes you go 'What?!' That's the kind of funny that can happen when telling stories.
One funny thing is when you go commando in a windy day wearing a skirt or a kilt. The wind can be quite unpredictable and might expose more than you intended. I once saw a girl in a short skirt on a windy day at the beach. She was trying so hard to hold her skirt down. It was a really comical sight.
I remember at an all you can eat salad bar. There was a man who thought the tongs were for decoration and used his hands to grab the salad. The staff saw and gave him a pair of gloves with a big smile. He was a bit embarrassed at first but then joined in the laughter. It was one of those unexpected and funny moments at an all you can eat place.
I knew a girl who tried to hide her smoking by using a scented candle. But she accidentally knocked the candle over while trying to take a puff. The whole room smelled like a mix of weed and the strong scented candle. Her roommate walked in and was really confused at first, then realized what was going on and just laughed. It was a total mess.
One funny thing is when people try to stay up until midnight but end up falling asleep just before the countdown. They wake up all confused when the fireworks start going off. It's hilarious to see their sleepy and bewildered faces.
When my cousin broke his nose during a basketball game, the shape of his nose was so odd that it looked like a little hill. And every time he tried to blow his nose, it made this really funny whistling sound. It was so hard not to laugh when he was around.
Some people might get the munchies really bad and end up eating really strange combinations of food. Like one person ate pickles with ice cream after using marijuana. It's quite a sight to see someone so adamant that it tastes good when clearly it's a very odd combo.
One funny thing that can happen is getting the munchies really bad. I remember my first time, I ate almost an entire pizza by myself in like ten minutes. I just couldn't stop. And every bite was like the best thing ever. Another is getting super talkative. I started chatting with a stranger about the meaning of life for like an hour straight.
A funny thing that can happen on New Year's Eve is when people try to do new year's resolutions too early. I saw a group of people at a bar on New Year's Eve who were already making bets about who would keep their resolution the longest. And one person said they would start their diet right then and there and ordered a salad instead of a beer, but then later caved and had a beer anyway. It was quite amusing.
One funny thing could be a case of mistaken identity. For example, at a new year's party, someone might mistake a waiter for a famous singer and start asking for autographs. The waiter, being a good sport, might start singing in a really off - key voice, which would be hilarious.