Walter places the frying pan on the lab table when discussing the machine but in the next shot it is back over the bunsen burner.
Firing a gun that close to a human ear, nonetheless two times, would lead to permanent hearing damage, not just a few minutes of muffled sounds.
Astrid says there were five victims at the first crime scene, but there were six (two criminals and four family members).
The little man asks Thomas Newton "Will there be any renumeration?" instead of "remuneration."