I never do that on a MUP. In fact I've only used a MUP twice and both times on the same day (Biked and then ran). I hate them. Either people are too slow for it to be fun or they are too fast for it to be safe (impossible to be both). I don't even know why people use them for bikes at all.
Usually it happens that we are going at a decent pace and have dropped a portion of the main group so knowing there is a planned rest stop we decide to attack it and wait for the others. Might not be a pro thing to do, but it makes it a bit more fun. Get a wee better workout and we get a chance to talk about stuff we are never going to buy for awhile longer
