The Lines that Got Away
There are many funny lines on ILL that either the studio audience didn't pick up on, or they were drowned out by the continued laughing of the previous lines.
Two examples:
In "The Kleptomaniac", Lucy is trying to convince Ricky and Fred that she doesn't have Fred's clock under her coat. As she attempts a beeline to the bedroom, Lucy says the last bird she imitated was " part cuckoo." The audience laughs so much that Fred's followup line, "I know someone who's ALL cuckoo" gets buried
In "The Freezer", when Fred, Ricky and Ethel are carrying a frozen-stiff Lucy out of that chest, the audience is laughing at Lucy's predicament so hard that Ethel's line, " Be careful going around corners - you don't want to snap off an arm!" barely registers.
Any other examples?