In the Quantum Realm, Scott produces the canister, successfully activates it, and collects all of the energy needed to help Ghost — basically a second’s work.
The hero believes it to be childish revenge for the extra second he took on the coms earlier, but the audience learns that’s definitely not the case.
Meanwhile, Scott is left stuck in the Quantum Realm with no visible means of escape.
He then calls back to his teammates for retrieval, but he gets no response.