The comedian was out at a shopping plaza Saturday in Calabasas with a friend, where it looks like he was sent out to make a food run. He ran into a pap on the way out -- walking on his own two feet, no less, and looking pretty solid -- and gave the guy a health update.

Kevin says he's grateful to be alive, and that he'll be getting back to work slow and steady ... seems he's in no rush to get on the grind again, enjoying time with his fam.

Then comes a pretty eyebrow raising moment ... Kevin walks to his car -- a 1969 Camaro, he tells the photog -- and gets in the driver's seat ... and then pulls away like it's nothing.

Even more troubling ... it doesn't clearly look like he pulls a shoulder harness over himself, at least from the angle we're seeing here -- which is a straight-on shot through the windshield. We looked into it, and shoulder belts were a rarity in the '69 model. Lap belts were there, but not all these old cars had the newly-enforced safety harness all cars have today.

Obviously, this is a big deal for a couple different reasons. The fact that Kevin's driving at all should be a little worrying, but driving another souped-up oldie like this might as well be a death wish, considering what he just went through about a month ago with the crash.

Remember, Kevin's 1970 Plymouth Barracuda also didn't have safety harnesses. Had they been there ... we're told it could've helped alleviate the injuries Kevin and co. endured.