For me it is a hyperfocusing. Nothing exists for me but what i directly experience at that moment.

The only danger for most people is if you are with a partner that doesn't know how to handle it. You really can get so far "out there" (or "in there" depending on your point of view) that you are unable to safeword.

Sub drop afterward can be troubling, but again it is mainly about how it is handled.

just my tuppence,
rose

i have to be "talked down" very carefully -- just like the control tower talking down a nervous pilot.