In the supermarket the deli/seafood handler kills the lobster on the spot. A person would never do this as a dead lobster quickly grows bacteria which can be seriously harmful to humans unless you cook it very soon afterwards.
Homelander visits Jonah Vogelbaum (John Doman), who says that he is breeding German Retrievers. The dogs are clearly German Shepherds.
The squib (special effects explosive) is visible under Annie/Starlight's shirt right before Butcher shoots her in the chest. The laser pointer goes right to that spot before the shot.