Much like DM Quirky Joe I have had the pleasure of running through some of these scenarios by the man himself fighterguystudios.
His Brains & Brawns style game is a great easy stripped down experience. If you are looking for something to run that is rules light, easy to arbitrate, and easy to just pick up and go, this is a great and surprisingly versatile rules set.
As far the individual modules are concerned. The one that sticks in my ribs was definitely "Tonk is Missing". I remember playing things like OG in my teens (a simplified caveman rpg) and this scratched the same itch. Running from angry heard of triceratops, playing cat and mouse with hungry dinosaurs, all while searching through a jungle for our lost chief was good fun. I still vividly remember while fighting to free our chief, my buddy Spartan kicking an enemy caveman out of the cave into the waiting jaws of a stalking T-Rex good fun.
Would definitely recommend checking these out you have very little to lose and only an afternoon of enjoyment to gain.