Funny anecdote of my opening night experience:
I was sitting next to a dad who had brought his 2 sons to see the movie (I'd guess the sons were probably about 10 and 12). The dad was probably in his late 40's/early 50's. As the movie goes on he's enthusiastically attempting to explain every artist/album/title of every song and every old pop culture reference to his youngest son who is clearly unaffected by his dad's nostalgic excitement, even shushing his dad several minutes into the movie. The dad is so overzealous he even explains how Footloose is a movie in the 80's after Quill has already made that pretty clear in his explanation on screen.
Anyways, the scene comes on where Quill mentions his ship would look like a Jackson Pollock painting and the whole audience cracks up, including this dad. For the first time all movie, the son asks his dad to explain what was so funny. The dad, caught off-guard and probably a little embarrassed for having to explain a line he and everyone else had just laughed so hard at, said after a brief pause, "What? Oh, I didn't hear what he said since I was laughing too much.....I understood the reference though......."
That was the last thing he said for the rest of the movie. lol
Doubles as a joke about blood being everywhere, that's what makes it ingenious.