Why do you think scientists often find value in looking at and comparing anomalies within data? ?

Absolutely, as anomilies can show inconsistencies with data and hypothesis they may have and may actually assist in refining the accuracyof their ideas by not only encompassing the most commonly-occuring phenomena, but also the more seldom occuring scenarios as well.

c because the action was the roller coaster reaches bottom of hill (action) reaction would be blood tends to drain away from head

hope this !