like watching a snot bubble pop. for what ever reason this is really interesting. came looking for a video after reading these things could explode if their tube (vacuoles) stopped working.
This was supposedly due to a standing wave of energy from ultra sound being pumped into it. Rife was doing this work back in the 1940s. Like a wine glass will oscillate and shatter when enough energy is pumped into it, so organisms too should rupture due to the same cause. It's all about resonance.