Hela did nothing but wait near the tail of the pipe for whatever outcome Natasha chose. If Natasha was dashed against the rocks meer feet below their head or went blue Thor would be livid and yet he should not be entirely unsurprised. This tenacious woman had a death wish, which would serve her well. If Natasha made it out of the tubr unscatched the redhead would earn Hela's respect and a delicious packed lunch and secure back on shore.