"Ten Pin Terrors" [1953]

[oldgreypole]

Is there a racial gag in the Heckle and Jeckle cartoon, "Ten Pin Terrors" [1953]? If so, explain the details.
A recording that I have of it shows a leaking bottle of chocolate syrup, suddenly cutting to Heckle and Jeckle running down the bowling alley.

[lislebartman]

If I remember correctly, after the syrup falls on them, H&J disguise themselves with white wigs/cotton and imitate old black men carrying trays...