Some riders 'take a whiz' whilst riding. Coast, pull up short leg or drop front of shorts and let go. Not good for the chain but mechanic can also relube whilst riding, if need be.
There can also be 'unofficial' pit breaks along the side of the road; while that is happening, courtesy dictates that there will be no break aways. Although that has been ignored in some instances.
Do not expect these pit breaks to be seen on OLN!