Can someone me critic this artwork , and explain how he used shapes and form to make this

The use of popping colors helps the piece stand out, along with the overlapping shapes that help fill the picture,

it isn't much but I hope this helps you get thinking. good luck 

Generally spontaneous human combustion is something that still bewilders some, human combustion happens very rarely and doesn't affect the surrounding areas, so unless you want to set your self on fire, human combustion will remain spontaneous and very rare.