A team of researchers in Israel have successfully tricked Tesla’s and Mobileye’s driver assistance features into stopping for pedestrians that weren’t there, and driving at speed limits posted on signs that don’t exist, exposing a possible flaw in modern automotive tech that could prove dangerous if exploited.

Researcher Ben Nassi from Ben-Gurion University just recently fooled a Tesla Model X running Version 2.5 hardware using a simple video projector. Nassi had previously fooled a Mobileye 630 Pro driver assist system with the same device. Nassi calls the system “Phantom of the ADAS.”