Well, let's consider the damage from the impact of a rocky asteroid, 60m in diameter. Plug this into the excellent Earth Impact Effects program at http://impact.ese.ic.ac.uk/ImpactEffects/. Assume a velocity of 17 km/s, which they say is "typical for asteroids," and an impact angle of 45 degrees.
The calculator says:
The projectile begins to breakup at an altitude of 54000 meters = 177000 ft
The projectile bursts into a cloud of fragments at an altitude of 4700 meters = 15400 ft
The residual velocity of the projectile fragments after the burst is 4.77 km/s = 2.96 miles/s
The energy of the airburst is 4.52 x 1016 Joules = 1.08 MegaTons.
No crater is formed, although large fragments may strike the surface.
Clearly you wouldn't want to be right underneath it, but even as close as 20 km, the air blast effects seem rather anticlimactic:
Peak Overpressure: 18900 Pa = 0.189 bars = 2.69 psi
Max wind velocity: 41.4 m/s = 92.6 mph
Sound Intensity: 86 dB (Loud as heavy traffic)
Glass windows will shatter.
About 30 percent of trees blown down; remainder have some branches and leaves blown off.
So it'd be like BOOM! But not like KA-FOOOM!
For comparison, the Chelyabinsk meteor was estimated at 17-20m, with an airburst energy of 0.4 MegaTons.