Mark Hamill's Joker voice promos

[The Laughing Fish]

This is the first time I've ever seen this compilation, but for those who grew up in the US watching BTAS on FOX and Kids WB, you might remember hearing Mark Hamill doing his Joker voice to promote upcoming episodes in the closing credits and in commercials. Here is a trip down memory lane, though you might need to adjust your sound a bit because the tape recording has this annoying feedback that comes and goes.