[quote=@Peik]
To what extent can the 'shoulder brushing' with the strange go? Are we talking 'might've seen a Skinwalker' level, or 'got swallowed up by the Dreamlands for a week' level?
[/quote]

Definitely nothing insanity-inducing on its own. It's really places where the mind could wander but you really don't want it to. Things like your SEAL guy raiding pirates in Southeast Asia (for the CIA, no less) and has to wonder why the CIA spook had to double-tap that thing in the bodybag.

A big smuggling ring getting busted by US Coast Guard and Navy SWCC, only to have the guys from team two that went to secure another shipping container with the "DoD Liaison" all developed acute radiation poisoning.

Etc.