In DC Comics, The Flash has died a few times due to various causes like sacrificing himself to save the universe or being killed by powerful adversaries. However, The Flash is a legacy character with multiple individuals taking on the mantle over the years, so different versions of The Flash have died in different ways.
Flash Terry died in 2004.
Sandy Flash died in 1778.
No
he tripped
George Flash died on 1990-11-22.
The Barry Allen Flash died in Crisis on Infinite Earths #8.
he ran into a wall
No. You can take a picture of them but don't use the flash. The flash could damage their eyes.
Unlikely. However, a rabbit can die of shock, so be careful!
Don't die.
until they die.
He was shot in one of Flash's marine/medic pushes.