Jumping height

[Alabama_death]

There is a bridge nearby with a height of about 100ft. Would that be enough to kill you immediately? The ground is a shallow creek with rocks

 

[Colgate]

There are accounts of people surviving falls from airplanes, so maybe a bridge would not be a fail-proof method...

 

[SexyIncél]

Lost All Hope claims:

The most important factor in suicide by jumping is height. Stone2​ states that jumping from 150 feet (46 metres) or higher on land, and 250 feet (76 metres) or more on water, is 95% to 98% fatal. 150 feet/46 metres, equates to roughly 10 to 15 stories in a building, depending on the height of one story. 250 feet is the height of the Golden Gate Bridge in San Francisco.

 

[Alabama_death]

So 100ft is some sort of gambling. Damn. The bridge is the highest point around here

 

[nopride86]

You're going to want 250ft plus for guaranteed fatality. There's too many stories of people falling from over half of that and walking (so to speak) away.