mtoroshanga
I also noted from news pictures that cabin door had been slid forward so blocking window jettison, and reducing evacuation capability. These doors can be jettisoned by the pilot. Why were they not done so?
Not sure which pictures you've seen, but I can't find any that show that (maybe you are looking at the CHC EC225 controlled ditching?)
In any case, to answer your question....
...after striking the surface the helicopter rapidly inverted...
https://assets.digital.cabinet-offic..._L2_G-WNSB.pdf