Matthew 27:49 - Ellicott's Commentary On The Whole Bible

Let us see whether Elias will come. — Here again we have eager expectation rather than derision. Was the “great and dreadful day” (Malachi 4:5) about to burst on them? Would the long-expected prophet at last appear? The sponge and vinegar would seem to minds thus on the stretch an unworthy interruption of the catastrophe of the great drama of which they were spectators.