There are several theories on how the universe was creating, all the possible ones including Chuck Norris. The cause big bang is debated whether if Chuck Norris roundhouse kicked god or nothing in the face. Both agree, however that the energy given off was approximately 1 CNRhK (Chuck Norris Roundhouse Kick). Another theory is that the big bang was a severe case of 'bad gas.'
When god said "let there be light," Chuck Norris said "say please."