When a person becomes so utterly absrobed by texting another indiviual on their phone, all bodily functions and contact with the outside world ceases, and thus the body is in a 'coma' state until the text is completed to an adequate level and sent.

When you eat dirt for the first time and leave your family to build a shack in the woods

When you are texting someone and you are in a zone when you don't hear anyone talking to you or know what is going on around you.