Without wishing to steal CX thunder, we had an interesting exchange between a TC and student:
Shortly after airborne A330 student leans leans across and engages AP1:
Student: "Autopilot One"
TC: "No mate, it's AY PEE ONE" (he has a point but minuscule one)
Student - No Response.
later....at cruise alt capture:
Student: "EM AY SEE AICH, AY ELL TEE, SEE AR ZED Star"
TC - Silence