As mentioned, nausea and vomiting are common symptoms of anxiety and stress. While vomiting can be a symptom of anxiety, it's not as common as nausea. Behaving anxiously activates the stress response.
On December 8, 2016, Cinemax and Sky1 announced they had greenlit a brand new series of Strike Back with a brand new cast, no longer focusing on former stars Sullivan Stapleton and Philip Winchester. Daniel MacPherson, Alin Sumarwata, Roxanne McKee and Warren Brown have been cast to star in the new series.
Even in the late 1980s, Vietnam was a powerful theme for Brand, who cast himself as Morrison. One of the central characters in Backfire, which he co-wrote in 1987 is also a Vietnam veteran. There are several editing errors in The Drifter.