Good looking guy! I am sure he will settle in for you.
As far as what you believed was regurgitation, that would have actually been vomiting. Regurge normally jhappens within the first 24 hours after eating and the prey item will appear to be mostly undigested. Vomiting can happen days after eating and the prey item will appear somewhat digested and will have a strong, foul odor. Either way, both are very stressful to the snake. I would leave him alone for a week (I know its hard) and don't feed him for 10-14 days. I would ask Clay how long it was since his last meal. If it was over 5 days (as it should be anytime a snake is shipped) then there might be other reasons for the vomitting. Keep a close eye on him and let us know how he does.
Jamie