It was the party to end all parties -- "a combination of Woodstock, 'Animal House' and 'Girls Gone Wild'" according to one man. Up to 4,000 strong, it lasted only two hours and ended with dozens of people sick and four people under arrest.
The Daily Mail reports that the party was held at an apartment complex near the campus of the Colorado State University on Saturday. It was organized by the managers and owners of the complex. The annual event is a charity fundraiser to "encourage new students to socialize in a relaxed atmosphere" according to a spokesman.
But the event was advertised on Facebook, and anywhere from 2,000 to 4,000 people showed up.
The complex said it did not provide alcohol, yet somehow booze found its way into the party because several people passed out and dozens of people were vomiting. Paramedics were called, which was the beginning of the end of the party. Fort Collins Police Lt. Dave Haywood said EMTs were "overwhelmed with alcohol-overdose cases."
Police also arrived and arrested four young men -- two for assault, one for disorderly conduct and one for interfering with police.
Two of those arrested are on the school's football team, the Denver Post reports.
The owners of the complex could face charges in connection with organizing the party.
Here is some video of the event: