Along Court Street near Desmond Landing in downtown Port Huron is the place to be for thrill rides, the big Ferris wheel, midway games and that great carnival food... it's the Big Rock Amusement Carnival going on now through Saturday night in connection with the Blue Water Fest.  Big Rock's Matt McDonagh tells us some of the thrill rides this year include the Gravitron, the Himalaya, the Extreme and more, plus there's about a dozen kiddie rides for the little ones.  Today it's Buddy Night, with no armbands, but you can get your buddy stickers at your local Speedy Q.  $20 armbands on Fri and Sat.