lobsters are on average .75 kg orbital velocity is just around 8 km/s a brick wall is a brick wall if you threw a lobster at a brick wall it would decelerate in less than half a second acceleration = s/t 8 km/s / .5 s = 16 km/s2 F = m*a .75 kg * 16 km/s2 = 12,000 N a lobster thrown at orbital velocity would hit a brick wall with 12,000 N, smashing the wall into bits and turning the lobster into a pink, delicious mist