Anyone heard of this before ??

After finishing a rather hot and sweaty ride on Sunday I was talking to a fella loading his bike into his van, and he started to let his tyres down a bit I asked what was he doing, he said he was letting pressure out because of the heat and especially in the van the tubes could pop, I asked what pressure he was running and he said 27psi, is this right or could happen ??
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I have had very old perished road tubes explode in the sun, but they were at 120psi.
There is no secret ingredient - Kung Fu Panda
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There is no secret ingredient - Kung Fu Panda
London Calling on Facebook
Parktools
they could