My buddy told me about this list yesterday, I forgot how ridiculous that show got.
http://macgyver.wikia.com/wiki/List_of_problems_solved_by_MacGyver
MacGyver uses several pine cones to act as ad hoc grenades / land mines. (Pine Sap has some latent explosive properties).
one more
He also builds a hot air balloon from scratch to escape from a Soviet search party. The balloon was made of homemade super-glue, old clothes, a parachute, welding equipment, a refrigerator and metal box. (34:00) Not so plausible in that time frame.