[Neil Jones]

In my case, something that scared me a lot during my childhood was the MGM Leo the Lion logo, more specifically, the roar. I was a fan of the Tom and Jerry shorts during my childhood, however, the Leo logo (and the racist overtones of many of the classic shorts) was the cause that led me to stop watching these.

Technically "Leo" (as Leo, since the lion mascot is Leo but the lions had other names) only appears (for Tom & Jerry purposes) on the reissued "classic" Tom & Jerry cartoons (though a handful may have Tanner depending on when they were reissued), and the later Chuck Jones cartoons also went back to featuring Tanner.

On topic though, and while we're talking about the MGM Lions, some of the very early lions (pre=colour) manage to look very creepy, since black and white has that sort of effect.