I know it's hard to believe, but I've never ...
You may not believe this, but I've walked ...
This may sound unbelievable, but I've ridden ...
You may not believe me, but I've never tried ...
I know it's hard to believe, but I've seen ...
You'll never believe this, but I've always liked ...
You won't believe this, but I've met ...
Believe it or not, I've had ...
You may not believe this, but I've ...
As amazing as it sounds, I've never made ...
This may sound unbelievable, but I've ...
This may seem hard to believe, but I've never liked ...
You may not believe this, but I've never been to ...
This may seem hard to believe, but I've been to ...
Believe it or not, I've always been good at ...
You'll never believe this, but I've visited ...