For me, it depends on the likelihood in that situation, the likelihood that Stark would have built that something in advance.
Like Batman & Robin. They leave the Batcave in the Batmobile, and Commissioner Gordon comes on screen and says we have a new villain in town and he's called Mr. Freeze.
And 10 minutes later, we learn the Dynamic Duo just so happens to be equipped with batskates in their boots! Oh please LOL
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