Against my better judgement I found myself doing the full Stage 5 yesterday. 1:18:05.
Started with no warm-up, right at the back, paced myself into the ride, ended up with a bit of a friendly rivalry with another rider and in doing so caught a fair few riders who we rolled up into what became a fairly decent sized autobus.
I made the mistake of attacking the sprint at mile 8 when no-one else in the group did, and while recovering I got gapped, the elastic snapped and I had a pretty lonely ride afterwards (with one exception who can be best described as a wheel-sucking jerk who makes me long for the opposite of a "ride on" button. I may have been shouting "take a f***ing turn!" at my screen.)
I lost over 8 minutes to "my" group in the last 5 miles due to stomach distress. I'm sure my legs hitting my pot belly 80 times a minute didn't help.
I should listen to my better judgement more often.