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