When Dibble is outside the pool parlor, TC and Benny are the only others ones out. A couple shots later, the others are out as well.
When the gang is informed about the tests, Benny is nowhere to be seen.
When TC is talking about how they're going to Florida, his hands go through the dirt.
In order to prevent TC from going up in space and to get Marvo to see his family again, TC and Marvo switch helmets. However, if Marvo was not going up in space, he should not be wearing his space suit.