Feat: https://www.youtube.com/watch?v=CuLsqL_Ta24&t=1m36s
T-Rex in Carnosaur is 4.8 meters tall.

4.8 m / 409.26 px = 0.01172848555 m/px
Head: 78.23 px = 0.91751942457 meters

0.91751942457 m / 187.01 px = 0.00490625862 m/px
Note: Meters are converted to Centimeters.
Wall height: 339.05 px = 166.346698511 cm
Wall width: 15.81 px = 7.756794878 cm
Wall length: 167.02 px = 81.944331471 m = 40.9721657355 cm as the radius
The hole seems to be a cylinder shaped.
Cylinder Volume: 877,287 cc
Concrete has the average yield strength (or other type of strength) of 30 MPa. I'm not buying concrete frag 2-6 j/cc since it is stronger than a wood.
Energy: 877,287 * 30 j/cc = 26.318610 Megajoules, 0.0062902988 Tons of TNT, Small Building level (9-A)
Took at least 8 tries (counted only shown in screen) to break it: 3.2898262724 Megajoules, Wall level (9-B)
Concretes are stronger than a wood, so 56.5 j/cc.
(3.2898262724 MJ / 30 j/cc) * 56.5 j/cc = 6.19583947893 Megajoules, Wall level (9-B)
The tyrannosaurus rex took all her strength to break a hole, so it is good enough to divide the energy by at least 8.
Final Tally[]
- Tyrannosaurus rex breaks a hole - 6.19583947893 Megajoules - Wall level (9-B)