THIS IS COMMS IF THERE EVER WAS COMMS. Look close … the tabs on the cans (which are perfectly aligned in a straight line) point towards what I think is the message. From right to left (could be the other way, I dont know) the first can points toward the light, the second (first in the row of 3) points right at the mirror (he is referencing himself maybe?), the 3d points right at Washington in the painting (crossing the Delaware river), the last can (or first) points to that nasty little piece of hardware (that I have never seen the likes of before), AND that vajra (see comment about what that is posted in this thread a few times).

So … we have LIGHT, MIRROR (maybe Elon himself), WASHINGTON, VAJRA and PISTOL (destroys internal and external enemies).