Meanings of emotional wallop in English

The chatty comedy builds to a spectacular sci-fi climax that, despite its charmingly lo-fi production values, delivers a transcendent emotional wallop.

Although this story of the last days of Leo Tolstoy is specialized material, it packs an emotional wallop that costume pictures often lack.

This was also the source of the episode's emotional wallop, drawing excellent performances (once again) from Matt Smith and Karen Gillan.