[youngtaff]

Hydrofluoric acid is nasty stuff that strips the calcium from your bones

My brother works in a oil refinery lab and had a HF acid escape.

Procedure for escape is jump in the lab shower, strip off and lather yourself with calcium based cream

Turning on the shower activates the lab alarm, and the medical and emergency crews turn up shortly after.

When things have settled there's a health and safety investigation / review of the incident.