- A very brief time
- Immediate
- Moment
- On the spot
- On the spot in a split second
- Pre-prepared
- Quick ... TNT is an explosion!
- Ad lib
- Extempore
- I am on time, usually first, but unprepared
- Musical compositions
- Offhand
- Spontaneously
- Spur-of-the-moment
- A moment
- An instant
- Instant
- Moment
- Most triceratopses disappeared in a flash
- Optical illusion
- Quickly, in a ...
- Impromptu
- Impulsive
- Spur-of-the-moment
- Uninhibited
- Unpremeditated
- Unrehearsed
- Without forethought
- At present
- At this stage, squashed toad gets extremely mushy
- Day after yesterday
- In the present
- In these times
- Now
- Now and from the beginning of time, oldies duelled against youngsters