Catering to the whims of the Web 2.0 crowd is tricky — but it usually doesn't bring in firetrucks. The Supernova conference, which wraps up tomorrow, served freshly made sliders, White Castle-style, at a party this evening. The fumes from this fare were enough to alarm San Francisco's fire department, which sent up a ladder crew to investigate. Photos from an eyewitness, after the jump:

The offending burgers.

Plaxo's Joseph Smarr and John McCrea deem the sliders Comcastic.

Here come the firetrucks!

Ladder at the ready!

Firemen converge on the culinary disaster.