should anything i mssed vs if i missed anything

Some examples from the web:

• Should anything happen with the police later on.
• - Why should anything have changed?
• I'm wired to a bomb that will detonate should anything happen to me.
• The captains want to be absolved of any blame should anything untoward happen.
• Should anything happen to lemitsu, confusion would undoubtedly spread all over the nation.
• My understanding is baptism is about making sure children get into heaven, should anything happen.
• Well, should anything fall through, then.
• Should anything unpleasant occur in the visitation area... we ask you to stay put.
• Now, should anything unpleasant occur in the visitation area... we ask you to stay put.
• But then Selena and I had one of those "should anything ever happen".
• You'll find Grant invaluable should anything go wrong once you're underway.
• There'll be surgeons standing by to remove you immediately should anything happen.
• Should anything be amiss with your maiden, he'll seize your entire stock.
• Should anything happen to George, you'd never forgive yourself if you hadn't parted in charity.
• Having the option of using different stockists and distributors gave pharmacies a back-up should anything go wrong.
• Because... it would be a tragedy should anything... untoward happen to our visitor.
• It would be a tragedy should anything...
• But should anything ever happen to one of us before the other, we never want to lose that connection.
• Nurse... you have my mobile, should anything... pop up.
• Should anything happen to me, you are in charge.

Some examples from the web:

• If I missed anything, we'll get to it at the psychiatric evaluation next Wednesday.
• I can run more tests, do a culture for pertussis, see if I missed anything.
• I'll stick it out longer, see if I missed anything.
• Someone once asked me if I'd missed anything.
• If I've missed anything or you have any mail, I'll take care of it.
• Seeing if there's anything I missed.
• I heard you were still looking at the victim's skeleton and wondered if you found anything I missed.
• Take it apart, see if we missed anything.
• I'm merely retracing your steps to see if you missed anything.
• I'm just wondering if we missed anything.
• We should double back and see if we missed anything.
• Let's see if we missed anything there.
• Agent MacKenzie's injuries have stabilized, but I need you to take a look, see if we missed anything.
• I thought maybe we could go back to the crime scene, Re-canvass, see if we missed anything.
• I just want to look them up, see if we missed anything.
• Reid's going through Julio's room to see if we missed anything.
• You know, I just want to see if we missed anything.
• Now, show me that you get it, go back through those bylaws again, and see if you missed anything.
• I was just looking to see if we missed anything before I sent it all to the property division.
• She's going through the case looking to see if we've missed anything.