That's not going to hurt the cylinder. The black oxide coating on the cylinder is ferris and so there is no arcing. My failed ground was because I sprayed the cylinder with the anti-splatter spray off camera.
Which brings up a point: is there a reason why every person I've met who welds talks like a primadonna about welding when in most cases welding is the welder's prerogative? My first two welds undercut because my settings were to hot. My buddy, Other Eric, was questioning why I was allowing the cylinder to cool rather than go and get a wet rag or use heat putty and knock out the whole thing at once.
Sheesh, people.