It should be noted that this trophy is CUMULATIVE - you do not have to execute the distance specified with 1 Thunder Drop. For example, you can Thunder Drop from a 50 meter building 10 times and earn this trophy.
If you do not know, the Thunder Drop ability, after it is unlocked, will allow you to leap from any height and come down hard in an area. Fun stuff.
Questions, corrections and neg vote justifications below.