Yes because all the blood goes to your head.
If by Dragon fish you mean Arowana then, no it is not normal for one to be swimming upside down. They grow into really big fish (over 40 inches long) so I hope you have a really big tank more than 8 feet long to house it in.
As long as it is in all capitals, the word "SWIMS" can be read upside down.
David Blaine will hang upside down for 60 hours for his "Dive of Death."
As long as your fish is not upside down all the time, it is not dead. Most likely your fish has a bladder disorder and it cannot help but float upside down.
The book Upside Down in the Middle of Nowhere by Julie T. Lamana has 320 pages.
12 hours
One's head will definitely explode if they hang upside for too long, too long being three days.
eight minutes
As long as we are talking about the loan being upside down, not the car:Yes you can trade it,BUTIt is not recommended as you will pay a large penalty in extra interest.
no
just stay upside down as long as possible while in the air
There is a risk of asphyxiation of a person hangs upside down for too long. The blood can leave the vessels causing oxygen to not circulate properly. There is not a risk if a person is healthy hanging upside down for short periods of time.