Bill Murray is having a Mini-Puft problem.

Rivian has released another Ghostbusters spot following its phenomenal commercial featuring Murray back as Peter Venkman, a modern Ectomobile, and an unbelievably good-looking Slimer. Seriously, it’s one of the best cross-branded commercials I’ve seen in years. Maybe a decade.

The new video plays like a little behind-the-scenes gag, with Venkman sitting...