'World's strongest coffee' is here and its caffeine levels are scarily high

A cafe is serving up the coffee to rival all others and it looks almost fatal.

The suitably-named Ass Kicker is being served at Viscous Cafe in Adelaide, Australia and it contains the caffeine equivalent of 80 standard cups-o-joe.

Legend has it, the first incarnation of the beverage was made for an emergency department nurse who needed to stay awake. The drink was consumed over a period of two days and kept the nurse up for three days in total. 

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Since then, Viscous Cafe owner Steve Benington has "toned it down a little" for general sale but the drink it still comes with a warning that it is not for the faint of heart.

Image: THIS IS RADELAIDE

The drink apparently tastes more like toffee than coffee and is designed to be consumed over a long period of time, with Benington telling Mashable his creation aims to "lift you up and keep you there instead of peaking through the roof and dumping you hard later."

For those chasing an instant hit, be warned; not all the caffeine in the drink is released immediately.  "Combining the minimum drinking time and the slow release of cold drip-imparted caffeine is how we achieve the sustained uptime" Benington said. 

Some pointed out that while the beverage packs a serious punch, some say it could also pose a serious risk to health, if consumed too quickly or by those with high blood pressure. 

A fatal dose of caffeine for a healthy adult is considered to be roughly 18 grams of caffeine consumed over a one to two hour period. A large Ass Kicker has five grams of caffeine and is recommended to to be consumed over a three to four hour period. 

As Bebington said "some people love it and some are broken by it, but it’s all in the name of fun."

Image: Anita d/yelp