A ton of safety disclaimers are shown when Alice and Bob are building an extremely safe experiment, like a mini-volcano set.
A "do not attempt" disclaimer appears over a scene of Alice and Bob suing the network.
Zig Zagged: The original disclaimer was a joke. But when someone tries it at home, they start giving serious warnings. Later on they stop doing all but the safest experiments. But the safety warnings come back as a gag.
Averted: Alice and Bob do all manner of dangerous experiments, and there is no disclaimer.
The network has to give people the disclaimer, otherwise they could get sued if people hurt themselves.