Ooh, so, so many.
A really big jar of marmite onto the kitchen tiles. It was only half full but still went everywhere. Really sticky, and you can't tell which bit is marmite and which shards of glass as they are both the same colour.
A glass bottle of milk, also on the kitchen tiles.
A jar of honey, on MIL's kitchen tiles.
A teapot, while I was pouring. It smashed the cup I was pouring into, splashed hot tea all over the sandwiches and cake on the table, then rolled onto the floor and smashed itself - this was in a cafe.
I was given a lovely framed picture by work when I was leaving, and I dropped it and smashed it on the way home 
I shouldn't be allowed out, should I?
DH once tripped on the rug and dropped a whole tray of those little foil trays of takeaway curry on the living room floor (and walls, and a bit on the sofa). We had to reposition the rug at a jaunty angle to hide the bright day glo yellow stains on the carpet, and repaint the walls.
DD managed to pull a big thing of lager of the conveyor belt in sainsbury's once, when she was a baby, sitting in the trolley. It belonged to the person behind us. DD, me, the cashier and the poor person who had wanted to buy the lager - and all our shopping were all drenched in a sudden cascade of beer. Still feel a bit mortified about it now and it was years ago - fortunately she hasn't shown any further signs of following in her mother's footsteps on that front since.