[Gunslingr3]

One must ask, why didn't he pull a gun when he got pulled over at the very first ?

Because the truck he was driving wasn't stuck. I'm sure he considered dying his last option ( he already made it clear by own statements he considered it an option), and once the truck was stuck and he was surrounded he exercised the option he saw available. I don't consider it unreasonable to consider him a man of his word, who died by it.

[UCANSEE2]

Because the truck he was driving wasn't stuck. I'm sure he considered dying his last option ( he already made it clear by own statements he considered it an option), and once the truck was stuck and he was surrounded he exercised the option he saw available. I don't consider it unreasonable to consider him a man of his word, who died by it.

That seems a reasonable explanation.