Surfer Joe/Evian water advertisement.
First, uses a concussion incident as a central plot feature, which would be in rotten taste under the best circumstances, but worst of all this is in the foul yuk-yuk joke tradition.
Second, uses the only major Beach Boys hit that I hate with a passion.
Third, relies on baby/toddler jokes, which are cheap as hell.
Good thing I already find the water yuckaroo.