Seriously guys i need help. If you don't have anything helpful to say don't say it.
chili dogsno but seriously, I don't think anyone here is really a Lava Lamp technician. Just try fiddling it, or take it to your mom or dad and see if they can't help.
They are asleep
Open it, see if you broke the switch or if the wires got messed up or something.
Unplug it first.
But seriously, unplug it then get a new bulb.
When it fell, it probably just broke the filament in the bulb. Replace the bulb.
The bulb probably got unscrewed.