2 minutes is an incredibly short time, if you speak at a comfortable pace.
I agree with a 'silly' subject done absolutely seriously rather than boring them senseless with a business case study.
German sausages for example.
Last similar thing i did was years ago, and it was 2 (or 3?) minutes too. Topics were allocated. I got French Chateau. Someone else got German Sausages. I crammed literally a wiki's worth of info into my talk and rattled on like a machine-gun. He took the piss, deadpan. We both met whatever criteria they were looking for - but his is the one we look back on occasionally, 6 years later, and giggle at. Most of them are long forgotten.