Reddit

You have to love what a rabbit hole Reddit can be.

Read this post

https://www.reddit.com/r/askscience/comments/5iexyv/if_fire_is_a_reaction_limited_to_planets_with/?

Which lead to this blogger

http://blogs.sciencemag.org/pipeline/archives/2010/02/23/things_i_wont_work_with_dioxygen_difluoride

Which sucked up at least an hour of my time on this and other posts of his :)