Too Much!

So I changed the battery out in the constant rain, see. I was soaking wet, of course. Upon connecting the battery the radio on the car went on, which it should not have done! Lights flashed, clicking sounds from inside. Dash lights flashing. Hey! This thing is having way too much fun all by itself . . . Gotta be a computer problem, right? Heck! I don’t know. I disconnected the battery so it wouldn’t drain. How many computer chips do these things have, anyway? Are they PROGRAMED to have fun when the key is off, say, after 100,000 miles?