Arrowing is when someone behind the leader is posted at turns, with their bike pointed in the direction of the turn. No cue sheets. The "human" arrow stays at their post until the sweep passes. So, if there's a large group (like today there were about 35 people and most were a lot slower than me), you have to wait until they all pass and then get back into the group. It takes a while to get back up near the front... some of these riders, bless them are a little squirrelly, and I always stay near the front. I could have arrowed today, as i did know where I was most of the time (I get a little anxious if I'm doing this in a strange town), but when I got up behind the leader, the person right behind him told me to "stay back, unless I was willing to arrow." Of course I was, at that point we were on roads I ride all of the time, but I think these guys didn't really know me, as I haven't been there in so long. Some of the stronger riders will stay near the back and then do sprints to get up to the front to take their turn arrowing. I have done this in the past, but I had to get used to some of the newer people today. I prefer to ride with those whose moves I can anticipate.