Shot from within the Angel's mouth of Unit-02 inside it.
SE <<Strain strain strain>>
Unit-02 is trying to force open the mouth.
The teeth are piercing its abdomen.
UrsusArctos: Eva-01 getting speared by Shamshel doesn't compare to this horror. Shinji and Asuka are lucky that their synch with the Eva is messed up, because having them react to being impaled by those choppers would have made the episode truly excruciating.