Ceramic Capacitor Pulse Current
Assume 10nH total inductance. Given V = L * dI/dT, or conversely,
I = 1/L * integral (V * dT),

the peak I = 1/10nH * integral (100V * 100nS) = 10^+8 * 100 * 1e-7 = 1,000 amps.

If your total inductance (caps plus solder pads plus GND inductance of vias + vias to a shared high current bus) is 100nH, the peak current is only 100 amps.