Have you ever checked a goal to find that is not anchored properly? We always check the goal nets for holes, but do you always check that the goal itself is secure? After watching this video, I know I will definitely pay more attention to this.
Note: Never assume that the crew before yours checked the field properly. Things unrelated to player safety (boundary lines, etc) aren't a big deal, but anything that could endanger the safety of players MUST be corrected before the game begins.