Ms. Zigana mentioned the efficacy of chest compressions combined with piercing stares (PS). She should know, since she delivers a quintessential PS on her website. Imagine its awe-inspiring power in the flesh.
However, the learning curve is steep indeed for implementing multiple simultaneous interventions. Many mistakes can be made by the inexpert practitioner.
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Figure 1. Reverse chest compression position, prohibiting piercing stares
Young Charles pointed out the value of guttural vocalizing, 'grumbling' in the vernacular. As he so astutely remarked, humans respond to the combination of grumbling and piercing stares with laughter 84.7% of the time. And it's been proven repeatedly that laughter is positively associated with All Things Good.
By the way, young Charles has embarked on a related study: The Importance of Eyebrow Strength and Flexibility to the Cute Face. Always nice to see a young scientist in the making.
Finally, Andrew of A+M+M+J introduced the term 'visual fixity' as the proper category for studies of this ilk. I am indebted to his lexiconical perspicacity.