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juggling eggs vi.
Keeping a lot of [state] in your head while modifying a program. "Don't bother me now, I'm juggling eggs", means that an interrupt is likely to result in the program's being scrambled. In the classic 1975 first-contact SF novel "The Mote in God's Eye", by Larry Niven and Jerry Pournelle, an alien describes a very difficult task by saying "We juggle priceless eggs in variable gravity." See also [hack mode] and [on the gripping hand].
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[jump off into never-never land]
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