Is There a Limit on the Energy of a Particle?

There is a speed limit to the universe. You can't go infinite velocity, so if he's infinitely far away from the apple, then it would never hit him. But fascinatingly, there is no limit on the energy of a particle. These particles have higher and higher energy, even though they don't go faster and faster. The relationship between energy and speed changes as you approach the speed of light.