A western honey bee (a.k.a. European honey bee; Apis mellifera), covered with pollen, landed on the wrong side of this showy evening primrose (Oenothera speciosa) and spent an interminable amount of time trying to figure out what went wrong with its landing.  It eventually found its way to the right side of the flower.

[larger versions can be seen here; the largest one is definitely worth a look; more can be seen here]