Superman's gasp of excitement is fully genuine. Thor's powers are fun, and impressive, and he rather enjoys having friends who are as... unbreakable as he is. Who doesn't enjoy being with genuine peers?

As soon as he knows the street won't crack any further, he also drops to his knees to dig out big and small pieces until they can see the pipe.

"Can you hear it?" There is the tiniest sound of scared mewling.

It's his turn to actually help out, so he presses his thumbs down on the pipe so he can gradually push it aside to create an opening for the kittens. It's fine that they're ripping open an important pipeline. Between the lightning and the lasers, they can fuse it back shut.