Complex sentence: Mowgli is once again completely wrapped up in Kaa's coils, with only his head and bare feet visible, but before he can eat the man-cub, Kaa is interrupted by Shere Khan, as he is looking for Mowgli.
Split into simpler sentences: Mowgli is once again completely wrapped up in Kaa's coils, with only his head and bare feet visible. Before he can eat the mancub, Kaa is interrupted by Shere Khan, as he is looking for Mowgli.