So Esta casts Locate Object, and then, jumps directly into a tidal bore!
He's not nervous, on account of this not being even in the top twenty most dangerous things he's ever done. Possibly the first time, with no Word of Recall, and no way to retrieve his body for resurrection, would make the top twenty occasions. But this? No.
He doesn't flinch as he jumps, because while he did get beaten bloody and finally drowned by the previous tidal bore, it wasn't all that painful per se. You've got to be able to walk into much more predictably painful gauntlets than that, without a betraying hitch in your step.