Another one soon to be ticked off the bucket list

I leave for a holiday to Asia tomorrow.
The trip takes me to Singapore, Ho Chi Minh City and Da Nang and then on to Honk Kong; one of my favourite cities in the world, but this time there is a different reason to be excited about travelling again and that is because AJ Hackett is operating the worlds highest bungy jump on the Macau Tower (in Macau).
I've bungy jumped before from Nevis in New Zealand but this is about 100 metres higher and I suspect will be much scarier at 234 metres or 61 storys. Yikes!.
I don't know why I want to do it and few people that I've mentioned it to are encouraging (including my wife); in fact they all say that I'm mad. Perhaps I am.
This will take bungy jumping off the list (until there's something higher like helicopter bungy)and I can then move on to other goals.
Not that I couldn't have done other things concurrently. I just happen to be at the bungy part of my list of goals.
Can anyone tell me why I want to do this? I feel as if I'm being drawn to anything that represents adventure and danger, for no particular reason and certainly not to impress anyone, since it's clearly not having that effect on anyone I know;
perhaps I'm trying to prove something to myself; perhaps I find it difficult to achieve anything unless it's on the extreme of experience.
If anyone should read this, please let me know your thoughts.
Thanks.