Complex sentence: Walt takes a moment to admire the lab equipment that Jesse had been using, and then collapses on the floor a police officer then goes to check his pulse and the episode ends before we can find out if he's alive or dead.
Split into simpler sentences: Walt takes a moment to admire the lab equipment that Jesse had been using, and then collapses on the floor. A police officer checks his pulse and the episode ends before we can find out if he's alive or dead.