I don’t know why he turned back into a snake; others have suggested he’s less susceptible to Dementor influence in that case. It is also possible that his alternate form was some kind of magic done to his snake form, and that he simply reverted to snake form on losing control of whatever was producing his fake human form.
That throwing away the wand is helpful was suggested by the previous incident with the dementors and Harry’s wand.
Actually, it’s possible that 1) he needed to throw the wand away to stop the cascade, but 2) became a snake to avoid any Dementor influence happening by way of the wand. He may also have felt that Bellatrix would be less likely to kill Voldemort’s favorite snake than some random human tool/servant of his.
I don’t know why he turned back into a snake; others have suggested he’s less susceptible to Dementor influence in that case. It is also possible that his alternate form was some kind of magic done to his snake form, and that he simply reverted to snake form on losing control of whatever was producing his fake human form.
That throwing away the wand is helpful was suggested by the previous incident with the dementors and Harry’s wand.
Actually, it’s possible that 1) he needed to throw the wand away to stop the cascade, but 2) became a snake to avoid any Dementor influence happening by way of the wand. He may also have felt that Bellatrix would be less likely to kill Voldemort’s favorite snake than some random human tool/servant of his.