On the ride home from work today, I was going through a section of road where there are some road works going on, so it is restricted to one lane traffic in each direction. So I hit the section and with a speed limit of 40km/h, I got into an aero position and rode the whole section (about 2.5km) quicker then the 40 km/h speed zone, and when I left the section and pulled over and sat up as the road resumed back to normal, a motorist who was behind me, pulled up and said "Bro, that was 45km/h you were doing, impressive", and drove off.
I smiled when he said that, considering I had done more then 10 hours work (and quite physically demanding work), hadn't eaten at that point for five hours, and in just in my work clothes, not in my cycling kit.