
It's about onesixtyfivethousandth as fast as a Tornado.
In other words, 123 inches per hour is 0.00001571893 times the speed of a Tornado, and the speed of a Tornado is 63,617.56 times that amount.
(EF2) (wind speed range average)
It's about oneeightyfivethousandth as fast as a Skydiver (headfirst).
In other words, the speed of a Skydiver (headfirst) is 83,000 times 123 inches per hour.
(HeadtoEarth orientation or standing, average conditions, terminal velocity)A headtoEarth or standingoriented skydiver's terminal velocity assuming average conditions is about 10,000,000 inches per hour. In a typical jump from 3,900 m (13,000 ft), a diver in this orientation will be in freefall for 46 seconds.
It's about oneninetythousandth as fast as a Helicopter.
In other words, the speed of a Helicopter is 90,900 times 123 inches per hour.
(for AH64A Apache, a.k.a. Hughes Model 77) (maximum cruise speed)
It's about oneonehundredthousandth as fast as a Lamborghini Gallardo.
In other words, 123 inches per hour is 0.0000098 times the speed of a Lamborghini Gallardo, and the speed of a Lamborghini Gallardo is 100,000 times that amount.
(for Gallardo LP 5502, a.k.a. Valentino Balboni, 2009 model)
It's about oneonehundredthousandth as fast as The TGV (train).
In other words, 123 inches per hour is 0.0000098 times the speed of The TGV (train), and the speed of The TGV (train) is 100,000 times that amount.
(Train à Grande Vitesse) (for SNCF TGV Réseau, a.k.a. "Network" model, a.k.a. TGVR) (maximum speed)
It's about oneonehundredthousandth as fast as an Arrow (archery).
It's about oneonehundredthousandth as fast as a Porsche 911.
In other words, 123 inches per hour is 0.00000949 times the speed of a Porsche 911, and the speed of a Porsche 911 is 105,000 times that amount.
(for Porsche 911 Type 997 GT2, 2007 model) 
