The cake explosion was tricky as too much gunpowder would cause the cake to evaporate. A couple of tests proved that.
The Proposal was shot in just two days on a small budget, but still included multiple fight scenes, gun play and explosions.
The fights coordinator on The Proposal, Master Tommy Chang, also designed the fights for the blockbuster Pacific Rim directed by Guillermo Del Toro. Master Chang is also a world-renowned 7th degree Taekwondo instructor and Grandmaster. He has worked with Steven Seagal, Chow Yun-fat, David Carradine, Vin Diesel, and Jackie Chan amongst others.
The fights took 10 weeks to design and create with Master Chang and the stunt doubles. Missy's stunt double, Ivett Gonda is a Canadian champion. a 2 time Olympian and Pan-Am Gold medalist.
As the budget was so small, most of the furniture and props came from the director's, Geordie Sabbagh, apartment.