“They then perform a small comic vignette aimed at highlighting the differences between the two computers. So in one, the PC has a "nasty virus" that makes him sneeze like a plague victim; in another, he keeps freezing up and having to reboot. This is a subtle way of saying PCs are unreliable. Mitchell, incidentally, is wearing a nerdy, conservative suit throughout, while Webb is dressed in laid-back contemporary casual wear. This is a subtle way of saying Macs are cool.” source...