Antenna Effect
When a chip is manufactured, long metal wires acts like an antenna and picks up charge. If this long wire is connected to a MOS gate, it can blow the gate. So, manufactures typically have max length of metal that can be connected to a gate. You can add diodes or jump layers to help fix antenna violations. Diodes will discharge the charges picked up. Jumping layers help by disconnected the long wire from the gate during processing of the long wire.
(Example: long m1 - short m2 - short m1 - gate. During processing of the m1, the gate is connected to only short piece of m1. When processing m2, only short m2 is processed, so less charge picked up.)