There's another method if you want to avoid removing the tank lid: Fill a bucket with water. Lift the toilet seat and lid. Dump the water into the bowl with one pour. Pouring slowly will only fill the bowl, so pour with as much force as possible to create a strong flush. Repeat until the bowl is clean of any residue.
In such an instance, it's recommended that you fill your tub with water beforehand so you'll have water in which to flush the toilet. During the interruption in .
That is connected by a chain or rod to the rubber flap at the bottom of the tank, covering the hole where the water enters the toilet bowl when you flush.