Lennie Smalls, one of the protagonists from John Steinbeck's Of Mice and Men, does a couple things he is proud of when he and George come upon the water of the Salinas river. George, a little slow, immediately throws himself down and begins taking "long gulps" from the green water. George, apprehensive about the water, warns Lennie that it may not be good to drink (given it "looks kinda scummy").
Lennie, curious about the "scummy" water, wiggles his fingers under the surface of the water. This creates widening rings which move to the far side of the water and back. Lennie is quite proud of this given he calls out to George in order for George to see what he has done.
Another thing which Lennie is proud of is imitating George exactly. After George is satisfied that the water is okay to drink, he takes a sip out of his hand, throws some on his face, and leans back away from the edge of the water. Lennie, always wanting to be like George, imitates him exactly. While not as poignant as the previous answer, this still has to do with Lennie, the water, and his pride. This act illustrates Lennie's loyalty and brotherhood with George.