Plant nervous impulse, in the "mouth" (actually a leaf) of a venus flytrap (Dionaea muscipula). If you're small enough to crawl touching only one spike, you're good. Touch two at the same time, and... SNAP.
flytrap teeth
![flytrap teeth](/content/images/size/w300/2020/06/045_flytrap_teeth_hd.jpg 300w,
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/content/images/size/w1140/2020/06/045_flytrap_teeth_hd.jpg 1140w,
/content/images/size/w1920/2020/06/045_flytrap_teeth_hd.jpg 1920w)
Plant nervous impulse, in the "mouth" (actually a leaf) of a venus flytrap (Dionaea muscipula). If you're small enough to crawl touching only one spike, you're good. Touch two at the same time, and... SNAP.