I love Nichijou, from the two episodes I've watched of it (I seriously need to get back to it).
The best way I can describe it: Imagine the most exaggerated, random or worst case scenario of how a person feels what could possibly happen in a normal, everyday situation or accident, and someone put it into animated form. (i.e.-- bumping into someone and causing a devastating, catastrophic explosion that would wipe out millions.
)