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