I know it's hard to believe, but I've never ...
As amazing as it sounds, I've never made ...
You may not believe me, but I haven't had ... since ...
You won't believe this, but I've just ...
You'll never believe this, but I've always liked ...
Would you believe, I've never been able to ...
You won't believe this, but I've worked ...
Believe it or not, I've always been good at ...
I know it's hard to believe, but I've seen ...
You will find this hard to believe, but I've already ...
This may sound unbelievable, but I've ridden ...
You may not believe this, but I've walked ...
Believe it or not, I've woken up ...
You may not believe this, but I've never been to ...
As amazing as it sounds, I haven't seen ... yet.
You may not believe me, but I've never tried ...
Would you believe, I've never had ...
You'll find this hard to believe, but I've always been interested in ...
This may sound unbelievable, but I've ...
You'll never believe this, but I've visited ...
This may seem hard to believe, but I've been to ...
You may not believe this, but I've ...
This may seem hard to believe, but I've taken ...
You won't believe this, but I've met ...
This may seem hard to believe, but I've never liked ...
You may not believe this, but I've gone ...
Believe it or not, I've had ...