I may be two-tenths of a split-second late

A lazy excuse for being a little late, but you're still acting like it's the most important thing in the world.

I may be two-tenths of a split-second late, but that's the most important thing right now.

I may be two-tenths of a split-second late, and I'm not going to let you forget it.

I may be two-tenths of a split-second late, and you're going to wait for me no matter what.