<P> The salt and ice challenge is an Internet phenomenon wherein participants pour salt on their bodies, usually on the arm, and ice is then placed on the salt . This causes a "burning" sensation, and participants vie to withstand the pain for the longest time . The challenge can be recorded and posted on YouTube or other forms of social media . </P> <P> The mixture of ice and salt creates a eutectic frigorific mixture which can get as cold as − 18 ° C (0 ° F), much colder than ice alone . This repeatable cooling reaction was used to calibrate the Fahrenheit temperature scale . </P>

What happens if you do the salt and ice challenge