away. Brooks testified that he and his crew generally worked seven days a week from 11:00 p.m. to 7:00 a.m. and that he would only get a day off when the well was finished and Patterson would move the oil rig from one drilling site to another, sometimes as frequently as every five or six days. Brooks testified that, once Patterson moved the oil rig to a new drilling site, he would have to drive himself and his crew members to the new location. According to Brooks, he would pick up his crew members in Odessa each evening and transport them to the drilling site for work and then transport them home afterwards. Brooks further testified that, on the day before the accident, Patterson called him and instructedSee Inge, 208 S.W.2d at 868. Inge was employed as an oil field "roughneck" and received an hourly wage, plus a travel remittance of seven cents per mile to cover the expenses of operating his automobile. Id. Under this arrangement, Inge went to work and used his own vehicle to transport himself and his fellow workers to and from the well site. Id. Inge received no wages for the time consumed traveling to and from work, and his employer made no deductions from the mileage reimbursement for social security or withholding taxes. Id. After completing his regular work shift at the well site, Inge started driving to his home in his own automobile, accompanied by two other members of his drilling crew. Id. While driving home, Inge's car