What would you do, If you got BSE infection?

Five high school students were arrested for skipping out on a YAKINIKU restaurant bill in Osaka Japan on 15th March. When the students had to pay the bill, they invented a pretext that "We got BSE infection because we ate your beef!".
The restaurant manager fought back saying "You can`t become sick so quickly!". But the high school students marched in the restaurant mimicking cow, and bellowed "Moo-Moo!".
The manager telephoned the police immediately and the students were all arrested. At the police office they said "We thought we wouldn`t have to pay the bill, if we said we were infected by BSE. But we don`t know what sort of disease the BSE is".