иметь глаз на(Some people try to get out of jury duty by lying. You don't have to lie. Tell the judge the truth. Tell him you'd make a terrific juror because you can spot guilty people just like that!flavorwire.com4uzhoj)
ни с того ни с сего(suddenly and, sometimes, unexpectedly: The alarm went off, just like that. • We were jogging slowly in the park when, just like that, she collapsed.Andrey Truhachev)