Final answer:
The question does not relate to a specific event where Paul hides under something for protection from shelling, but metaphorically speaks to the theme of seeking shelter or protection, as in the Gaul warrior shielding himself.
Step-by-step explanation:
The passage in question does not explicitly detail Paul hiding under a specific object for protection during shelling; instead, the text provides a broader, figurative representation of protection and salvation.
The theme of protection is metaphorically depicted through phrases like "creating their own shelters", indicating the act of seeking refuge, and in the historical context of Saul's conversion, taking shelter under the grace and call of God.
Nonetheless, considering the theme of refuge in dire situations is consistent throughout the provided passages, one might deduce a metaphorical interpretation of refuge which could be, for example, under shields, a symbol of protection seen in the depiction of a Gaul warrior.