I have one that is weather related - similar to
@Colster - flying CBR to SYD, but on Ansett. I'll skip over that one other than to say I was one of five people in the entire plane not to vomit. Two of the others were flying the thing and one of the others was a FA.
I have two others...
First, I was flying CNS-BNE and sitting in Row 3 on VA with the two mini-Gremlins next to me and Mrs Gremlin across the aisle. The middle seat next to Mrs Gremlin was free and there was a bogan in 3F at the window. Halfway down the runway for take-off, the bogan pulls out a cigarette lighter, takes his hat off and sets it alight. I immediately double-ding the FA Call button repeatedly (I know what that means and I felt it was appropriate). I have line of sight with the FA in the jump seat and she is staring at me with daggers. As soon as she could, well before she would normally unbuckle, she does so and storms towards me. I just point at the moron. FA goes ballistic at him. Confiscates his lighter and hat. He's told in no uncertain terms that if he even blinks out of line then the restraints will come out. Rest of the flight was uneventful, but as we disembarked we could hear the guy arguing with the FA about wanting to get his hat and lighter back.
Second one. I was flying HKG-SIN on SQ on my way to CBR. I'd been in the lounge in HKG and took a pre-made sandwich. I took a small bite and it tasted to me like the butter was off. I didn't eat any more.
I got onboard and took my seat in Y. My seat mate was a young, bubbly and very talkative Hong Konger. As we taxied down the runway, I knew something wasn't right with the sandwich. As soon as the seat belt sign was off, I did a mad dash for the bathroom. Violent output ensued. After about 10 minutes, I made my way back to my seat feeling somewhat ok. That lasted about 10 more minutes and I started to feel crook again, this time with cold sweats added for good measure. My talkative seat mate noticed and the following conversation was had...
Her: You are feeling sick?
Me: Uh huh.
Her: (Smiling brightly) I will give you medical attention.
Me: (Side eye) You a doctor?
Her: (Emphatically) No. (Bright smile)
Me: You a nurse?
Her: No. But I am studying at University.
Me: You're studying to be a nurse at Uni?
Her: No. I am studying architecture. I will be a very good architect. But now I will give you medical attention. I have exactly what you need in my bag. (Pulls out an apple and goes to hand it to me)
Me: Umm. No thanks.
At that point, I felt the need to get to the bathroom very, very quickly where I was more violently sick than I'd ever been in my life. About 15 minutes later, a FA knocks on the door asking if I was okay. I told them I wasn't. The F cabin was practically empty, so they moved me to the back row there, made up as a bed, ignoring the comments of my seat mate who continued to assert that she was able to provide medical assistance. I remember being given oxygen. The call went out for a Doctor on board. There was none. I recall hearing one end of a conversation between the FA to the coughpit. I worked out that they were trying to decide whether to divert to Ho Chi Minh City to offload me or whether I'd be right to make it to SIN. I was desperate to hold on. If I was going to be hospitalised, I wanted it to be in Singapore not Vietnam. Somehow I made it.
I had to wait until everyone else had disembarked and then was met by a doctor who assessed me onboard. They took me in a wheelchair to what looks like a small operating theatre somewhere in the bowels of the airport where they asked me to sign a document (I know not what) and then they injected me with something. As the needle is going in, the nurse says, "You wouldn't have this in Australia as it's banned in your country!" I remember thinking that I needed to count my kidneys if I ever made it out of here alive. But whatever it was they gave me, it worked! Within 15 minutes I was completely human again. Amazingly, I even made my connection to Australia.