Let's see if I can get all these...

Josh is riding a dinosaur from Future War. Or Tammy and the T-Rex (although that would probably include sock arms).

Rich is wearing the Emperor Palpatine hood. Or the Cameron Mitchell hood from Low Blow.

We've got the eye from The Killer Eye, and the penanggalan from Mystics of Bali.

Mike is wearing the infamous show biz pizza bear costume, from Rich Evan's childhood birthday photo and from Trick or Treat, along with the robot arm from Future Force.

Jay's got the triple arm...thing...from Blood Debts, but I think the costume is probably from Raiders of Atlantis?

Jack's got Jeffrey Combs' pineal gland from From Beyond, dunno why he's also a slug though.

We've got tums, from the tums festival, from Samurai Cop (womp womp), and the baboon from Order of the Black Eagle.

The car is Leo Fong's, from Low Blow. The boxes...may be from Future War? Or Alien Seed? Or Low Blow? Not sure.