Complex sentence: Jerry at first seems to have been safe but is then caught by a younger (and thicker-lipped) cannibal who licks his lips and fancies barbecued mouse which makes him horrified and chases after the mouse and the cartoon irises out.
Split into simpler sentences: Jerry at first then seems to have been safe but is then spotted by a younger and thicker-lipped cannibal who licks his lips and fancies barbecued mouse. Jerry gets horrified, and the cannibal chases after the mouse and the cartoon irises out.