[Knowing an argument is what Bakugou would latch onto if it were started, Izuku doesn't take the bait. Instead he focuses his attention on the door again, noting how the small blast Bakugou just created left some cracks in the wall.]
This wall has two layers, we know that from watching the others trying to get out. The cement wall isn't hard to get through, but there's heavy metal behind it...it's not made to be easily blown through. And you saw what happened when Kirishima-kun broke through the concrete layer. There were so many huge pieces of rubble around that made Uraraka-san using her Quirk in such close quarters dangerous for both of them.
Our best bet is to think of a way to get through both layers at once.
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This wall has two layers, we know that from watching the others trying to get out. The cement wall isn't hard to get through, but there's heavy metal behind it...it's not made to be easily blown through. And you saw what happened when Kirishima-kun broke through the concrete layer. There were so many huge pieces of rubble around that made Uraraka-san using her Quirk in such close quarters dangerous for both of them.
Our best bet is to think of a way to get through both layers at once.