Did Columbine kids prank 911 before 4/20?

Maybe:

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In the office of the choir room, the heat became oppressive. Some students began to faint. Several had asthma attacks.

Kami Vest: "We were all standing shoulder to shoulder. It got so hot in there that people were starting to pass out. We took the panels off the ceiling so we could get more air in."

The room held a single telephone, but the students were unable to reach 911 – possibly because that option had been disabled to stop students from making prank calls. But eventually a student reached a family acquaintance who worked in law enforcement. That person relayed the location of the trapped students to the SWAT team.