Ok, thanks to a friend, Miklos, we now have the best description of McGuyver's skills to date...
Note to myself: if the zombie apocalypse does hit, get Dave’s current address. He sounds like a useful guy to have around for everyday tasks, like when we will need to install a self-driving module in the truck that hauls the boat which will be used for launching the modified airplane that runs on cow dung (since kerosene won’t be readily available), to evade the zombies and find fresh water. And cow dung.
Yep. That pretty much sums it up.