I was caught completely off guard, no notice,

My costume wasn't quite as sexy as hers. She caught me completely off guard. I didn't know who this person was.

I don't know, but it looked like it caught him off guard.

I went in there after Tram. I was kind of caught off-guard.

I think the governor's comments caught everyone off-guard.

It definitely caught me off guard. But anything can happen.