Sometimes life is like waiting at a bus stop. You wait for the bus and when it comes there are too many people already on board. So you wave it past and wait for the next one. Often you have an idea when it will arrive but sometimes an untimetabled bus comes along that says it’s going to your destination but you have no idea which route it takes.
Thing is, if you wait too long the bus you do get might only go as far as the terminus.