As Donald Trump spoke Tuesday in Monessen, Pa., social media, as usual, began to weigh in on his speech, but not in the usual way.

Most  of the comments centered not on his policy, but on his platform -- the one he stood on.

Trump gave his speech at Alumisource in front of what looked like bags of smashed aluminum cans. Alumisource, according  to the company website, "provides a variety of products in the form of raw materials for artificial slag conditioners, deoxidation and desulphurization products."

The colorful, albeit odd background, drew attention on social media and produced comments like these: