Ants!!
Uttered a few expletives under my breath (not too loud, as daughter #3 was watching Alien in the dark in the next room) & hoped we still had that can of Nippon kills-all-known-creepy-crawlies-except-spiders-dead spray somewhere. Being a family of congenital hoarders, we did. It had no doubt deteriorated over the years (hopefully not into a too carcinogenic state) but I used it copiously enough to drown the b*ggers anyway.
(Apologies to any ant-lovers out there.)
Then went round the kitchen stamping on the escapees. Daughter #3 thought I was experimenting with some new sort of exercise regime & came to investigate. After I explained, she watched the rest of Alien with the light on....
I may not win any prizes for Housewife of the Year, but I do have my standards, & ants don't pass, OK?