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