Final answer:
Pi is a mathematical constant that represents the ratio of the circumference of a circle to its diameter. It does not do anything with objects that hit it in the face.
Step-by-step explanation:
Pi is a mathematical constant that represents the ratio of the circumference of a circle to its diameter. It is approximately equal to 3.14. Pi is an irrational number, which means it cannot be expressed as a fraction or a terminating or repeating decimal.
When an object hits Pi in the face, it does not do anything with the object. This question is likely meant to be a joke, as Pi is just a number and does not have any physical presence or actions.