Not much to this one -- just have "Guinness Man," similar to "Kool-Aid Man." Courtesey of Bob.

Set it up similar to the old Kool-Aid commercials.

College dorm. Frat boys drinking from a keg. Two in foreground.

FB #1: This beer is lame!
FB #2: I wish we had Guinness!

(At this point, a giant can of Guinness with arms and legs comes crashing through a wall)

GUINNESS: Ach aye!!!
FB #1: It's Guinness!
FB #2: Hooray!

(Cut to shot of can of Guinness)

VO: Guinness. It'll get you right *bleep*ed up.

(VOICE OF) GUINNESS: Ach aye!!

(Sound of explosion; shot vibrates.)