He laughed and drank when Bud suggested that they drink.

He laughed and played whatever game Bud urged him into.

He laughed and agreed with Bud when Bud made statements to test the credulity of anyman.

He laughed and said, "Sure.

Let's go!" when Bud pined for a change of scene.
On the third day Bud suddenly stopped in the midst of a game of pool which neither was steady enough to play, and gravely inspected the chalked end of his cue.
"That's about enough of this," he said.