Street Uni X - 2,423,884,800 point combo (integer overflow) 

in this very long boring video i do a 2 billion point combo that exceeds the game's max score value which loops back down to negative 2 billion! pretty cool
the strategy is pretty simple: grind a circular rail until combo base value exceeds 2 million, then loop footplant → flip trick → footplant until multiplier reaches 1200x. doing backwards-facing footplants helps keep your speed at a very maintainable level so you don't bump into geometry or fall off the level