4. “Lightning fast” = 60 miles per second.
Based on the time it takes for lightning to hit the ground from the clouds. It’s faster when greased.
5. “In a jiffy” = approximately one nanosecond.
About a “light-foot,” or the time it takes for light to travel 12 inches.
7. “Get into high gear” = 50 milliseconds.
The time it takes the supercar Lamborghini Aventador to shift gears, in which a neuron could fire only 50 times.
12. “Like wildfire” = 14 miles per hour.
Based on how fast a wildfire can move through an area, depending on wind and other factors. You could run faster than this.
13. “Make it snappy” = 15-20 miles per hour.
Based on slow-motion video of people snapping their fingers. Considering the speeds, you could make it snappy like wildfire.
18. “Beat to the draw” = 0.21 seconds.
Based on the (highly disputed) fast-draw gun-slinging record. This is almost faster than the average human reaction time.