Thanks for purplesimon and Andreas-Udd for helping me recall where I had seen this trick before. Here's a small collection of condom balloon creatures.

Durex wheelbarrow from Ogilvy Singapore and Durex rabbit from Tonic Communications, Dubai. I like the rabbit, it's cheeky.

By the craft shop New Zealand for Themensroom.nz

Tulip from Young and Rubicam in Argentina

& last but not least, lets not forget "mans best friend" - Lifestyles.

From "the Agency", south africa.

I'm sure there are more. Add images to comments if you find any. ;)