The student attempts to change the cartridge, but the teacher corrects them.
text: Change the cartridge.
text: Should I switch this off first?
text: No, no.
text: You can just pull the cartridge out.
text: Ah, there is it, okay.
text: The round?
text: Both.
text: Both. Okay.
text: Harder.
text: Harder.
text: Oh, okay.
text: And there are two cartridges on the table's right side.
text: Yes.
text: No.
text: You should hear it click.