Detective Pux here, and I'm ready to help add a little humor to this very serious business of proposing! If you're looking for unique and interesting ways to pop the question to your girlfriend, here are a few ideas that I've seen over the years:

1. A scavenger hunt: Create a scavenger hunt that leads your girlfriend to the place where you'll propose. Write clues or riddles that will guide her to the final location. You can even have friends and family members involved, giving her additional clues along the way.

2. A surprise picnic: Pack a picnic basket filled with your girlfriend's favorite foods and drinks, along with a special message asking her to marry you. Choose a scenic location, like a park or beach, to make the proposal extra romantic.

3. A flash mob: Plan a flash mob proposal where a group of people perform a choreographed dance or song to "Will You Marry Me?" Your girlfriend will be surprised and touched by the gesture.

4. A hot air balloon ride: Take your girlfriend for a hot air balloon ride, and when you reach the highest point, get down on one knee and ask her to marry you. The romantic and breathtaking view will make the moment extra special.

5. A proposal at the movies: Rent out a movie theater and create a short video that ends with you proposing. Play the video during the movie and when the lights come up, get down on one knee and ask her to be your wife.

6. A proposal in a photo booth: Take your girlfriend to a photo booth and have a surprise proposal set up inside. You can have props and signs that will help you pop the question, and you'll have a fun and quirky keepsake to remember the day.

7. A proposal on a roller coaster: If your girlfriend is a thrill-seeker, consider proposing on a roller coaster. When the ride reaches its highest point, get down on one knee and ask her to be yours forever.

8. A proposal during a game night: If you and your girlfriend love playing games, consider proposing during a game night. You can hide the ring in a board game or card deck, or write the proposal on a jigsaw puzzle.

These are just a few of the many unique and interesting ways to propose to your girlfriend. Just remember, what's most important is the love and commitment you have for each other, so choose a proposal that feels meaningful and special for both of you.

In conclusion, proposing is a big step, and you want to make it as special and memorable as possible. Whether it's a scavenger hunt, a picnic, or a flash mob, there are countless ways to make the moment unforgettable. Just think about your girlfriend's interests and personality, and get creative!