(see what I did there?) Two examples today on the (slightly rainy) ride in, one good, one bad. First guy was a relative n00b: riding along with his feet down a lot of the time in the wet. Split a huge gap, kind of tentatively, then balked at a gap that was still plenty big enough. Saw me coming up in his mirrors and moved back into his lane and well to the right, giving the more confident rider plenty of space and a good signal to split by and be gone. Second guy was sitting in the right of his lane, angled toward the gap for the split, but not moving. I came up very gingerly, sat there for a bit, then split by with some trepidation. All the signs said he was about to split, and he either wasn't aware or didn't care about my approach, but he was covering the corridor to some extent. Know your own skill levels, be sensible and modest and considerate, keep an eye on your mirrors. The first guy has everything he needs to become an excellent rider.