A few yeas ago there was a Champs de Elyses break away with three guys. They really had it going and were working well with each other. I think they were growing their lead and then coming across the Place de la Concorde they started playing cat and mouse with each other trying to make the other guy start the lead out.
You could see the bunch screaming up from behind and I think the peloton went by so fast they couldn't even catch on. As boring as the final day's "parade" can be, something fun usually happens at the end.