Just set off an old school roadway safety flare inside of one.
Decent chance that'll set off the fire suppression system, which will functionally ruin the datacenter, at least temporarily.
$23 bucks for 6 of em at Walmart.
Also substantially lighter and easier to handle than a bucket of salt.
Uh for legal purposes this is a joke, dark comedy.
Get it?
Because... a flare... is actually... really bright?
Hahaha!