When Walter and Toby enter the bank, the manager is helping a female customer. She is nowhere to be seen when the manager and his accomplice pull out their guns.
Since Toby doesn't know how to rig the fuse box Happy has to talk him through it but he has the yellow and blue wires together and starts twisting them together before Happy tells him to do it.
Toward the end of the episode in the waiting room Walter starts getting up from his seat, the camera angle changes and he's sitting down before standing up again.