| subito(adjective, surprise, unexpected, sudden) |
| suddenly(adjective, adverb, surprising, not expected, not planned) |
| unlooked-for(adjective, surprise, unexpected, surprising) |
| at the drop of a hat(expression, idiom, not expected, not planned, unhoped) |
| brash(adjective, sudden, unlooked-for, unhoped) |
| brisk(adjective, sudden, unlooked-for, unhoped) |
| by chance(adverb, unexpected, unhoped, uncontemplated) |
| against all odds(expression, idiom, not expected, not planned, unhoped) |
| against the odds(expression, idiom, not expected, not planned, unhoped) |
| as the spirit moves(expression, idiom, not expected, not planned, unhoped) |
| come out of left field(expression, idiom, not expected, not planned, unhoped) |
| flasher(adjective, surprise, unexpected, sudden) |
| from left field(expression, adjective, idiom, extraordinary, wonderful) |
| from nowhere(expression, idiom, not expected, not planned, unhoped) |
| if the spirit moves(expression, idiom, not expected, not planned, unhoped) |
| it's just one of those things(expression, idiom, not expected, not planned, unhoped) |
| just like that(expression, idiom, not expected, not planned, unhoped) |
| make something up as you go along(expression, idiom, not expected, not planned, unhoped) |
| on autopilot(expression, idiom, not expected, not planned, unhoped) |
| on the hoof(expression, idiom, not expected, not planned, unhoped) |