Flashovers are awesome in their fury (as long as you're not up close and personal)!
For even more poop-in-the pants thrills try a BLEVE (boiling liquid expanding vapor explosion).
Train car BLEVE
My previous experiences as a HAZMAT Tech and ERT Incident Commander at a major semiconductor manufacturing plant exposed me to a lot of knowlege and instilled a cautious respect regarding the chemicals we used. Pyrophorics like dichlorosilane; lethal gases like arsine (also a pyrophoric), phospine, and diborane; and all manner of highly reactive (and explosive in certain combinations) acids are commonplace in the industry. We had several equipment explosions (mostly from by-products in our "scrubbed" exhaust; a silane gas (pyrophoric) cabinet leak that made one heck of a learning experience; a truck running into our overhead hydrogen gas lines; and more acid spills than I care to remember. We trained with the local FD on a regular basis.
I got to hand it to all you firemen for facing these dangers on a daily basis. You never know what you're running into on any call and especially on industrial emrgencies. Thanks for puttin' it all on the line.