Final answer:
Paul sensed an electric tingling along his skin when the shield edges touched, indicating a crackling field and a physical sensation of electricity upon contact during his fight.
Step-by-step explanation:
When the shield edges touched during the fight that Paul was involved in, he felt the field crackling and sensed an electric tingling along his skin. This description indicates that there was a palpable exchange or interaction between the surfaces that could be somewhat similar to an electrical discharge or sensation resulting from the contact between two energy fields.