Me and the wife were cruising on I-75, minding our own business doing about 70 mph. There are four lanes in that particular stretch. We were in the left-center lane and I wanted to move to the right-center lane. I put my turn signal on, looked over my right shoulder and only saw a car in the slow lane. As I merged, a Ford F-250 came up doing at least 85, probably faster, merging into the same lane. He honked his horn and I swerved back into the left center lane and he kept blasting along. We got within about 6 ft. of one another. I don't believe I was at fault, but who knows. He was moving so fast as he passed that car, I didn't notice him before I moved. But, Praise the Lord we missed!