The feel of it? From what I can see, it's a city-wide party which includes a party masquerading as a parade which makes every other parade in existence green with envy.
People hand them drinks. Put funny hats on them. Hand them drinks. Paint their faces as they're walking along, whether they want it or not. Hand them drinks. Oh, and people hand them drinks. Or drugs. Or just put a slap-patch with some drug or another onto them. It's a party where it's 'cut loose with all you got because for the next 40 days, it's total abstinence time' - it's the same thing as Mardi Gras in New Orleans, but cranked up to 11 while New Orleans' party is about a 7.8 on the Party RIchter Scale. Moving quickly - especially in a vehicle - is not going to happen. Being all dark and leathers and shades and grim is going to make you stand out.