Poison Ivy 3

Plants put up with a lot of abuse from us. We mow them, we prune them, we eat them and log them. For the most part, they've taken it in stride. Occasionally they'll give us a rash, or fall on our car, but most plants just like to veg out. But what if they turned over a new leaf, and branched out into more aggresive forms of retaliation?

In this contest, you're job is to show us ways that plants could strike back at us our our civilization. Show vines engulfing our streets, or a palm tree bombarding people with coconuts. Show plants as the green berets you know they can be.

As always, have fun, be creative!, follow the guidelines please, and be careful to avoid using cliches. You will have 48 hours to submit so make your entry count!