Is 250 miles per hour as fast as a Fastball (baseball)?
It's about two-and-a-half times as fast as a Fastball (baseball)
The speed of a Fastball (baseball) is about 92 miles per hour.
(a.k.a. rising fastball, a.k.a. cross-seam fastball, a.k.a. heater, a.k.a. hummer, a.k.a. smoker; for four-seam grip) (major league average)
The average speed of major league fastball pitch is 93 miles per hour. When up against the quickest professional fastball pitchers, a batter may have less than 0.4 seconds to react to a pitched ball.
There's more! See other comparisons to 250 miles per hour...