Oscilloscope gear and ESD
A grounded 15pF probe should be low risk if the unit is grounded but your finger needs a string to remind you to wear a wrist strap. (1M to gnd)

But if you are lucky to have a 500MHz Tektronix differential FET probe, those FETs are rated for 25V &lt; 1pF and  technicians hate engineers who bring in broken probes for repair.  You can blow those looking sideways unless you practise safe Test Engineering EOS awareness.

e.g. Always shake hands or touch someone before handing them a board handled by the ground , V+ rails