מבטל כלי מהיכנו (nullifying a vessel from its normal usage). Putting a כלי (utensil/vessel) under candles to catch oil, to catch the candle and...
(Temporary Ohel) Introduction to Temporary Ohel (tent, roof). The prohibition of making temporary roofing;
Many problems that arise in making egg salad, chopped liver, tuna fish, etc. (Besides the issue of LOSH).