An explosion of praying mantids!
They were on my #2 pencils:
They hatched out of this ootheca (nerdy word for egg case):
If you ever find yourself in a similar situation, do not fret! All you need to do, is collect them in a jar and release them into the closest garden!
Live long and prosper my tiny predatory friends, eat lots of pests and keep laying those oothecas!