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