'Air,' Tom thought to himself, 'I need air.' He was frantically swimming around near the floor of the lake, searching for... God knows what. He had been under the water for a minute or so, the boys that threw him in there probably long gone, and his vision was fading. 

Then, he saw it: a painting, depicting a castle, at the bottom of the lake. Blue, sparkling currents were circling around the picture, and Tom reached out to grab it... Only to, in a matter of seconds, be sucked in and appear some odd feet in the air.

Tom spat out some water, then looked down, before falling a dozen or so feet onto the ground. "AHHHHHHHHHHH!" He shrieked as he fell, thinking he was about to die. But, he didn't. 

When he landed, he was still soaking wet and began to cough. Looking up, Tom saw the castle from the painting, and mutters "Fuuuuuuuuuugh..." Before his head hit the grass and he passed out from exhaustion.