Continuity mistake: During the drink-mixing sequence, the ice in the glass keeps changing position between shots. When, at the end, Venom pours the content of the mixer, it spills out, leaving the top half of the glass empty and mostly transparent. However, a second later, the glass is full to the brim with thick fluid.
Continuity mistake: When Venom fixes themselves a drink while singing "Tequila," Tom Hardy's right hand holds the mixer in different positions in each shot.
Continuity mistake: When Eddie and Martin meet for the first time in the woods and they are having a conversation, Rhys Ifans wears his necklace with the pendant above his clothes in the majority of the shots, except the ones when the camera is focused on Tom Hardy and he is facing left. In those shots, the pendant is under the T-shirt.