Sidamo's cousin Scarlett, who is a few months younger than he, came for a visit the other day.
They're pretty much the exact same height, but it's distributed very differently—look at what a behemoth he looks like next to the dainty little girl when they're sitting down. His extra 7 pounds really show when gravity does its work.
In the second photo he's reaching back and saying, "Tickle, tickle!" Scarlett, meanwhile, is planning an escape route.