Against the guest Energy Refiner
Five minutes into the sparring against the guest Energy Refiner, Aldrin immediately found out that his first strike was his first and last connected hit within that duration.
By utilizing his known Concept early on, he got that clean hit. However, soon after the guest Energy Refiner recovered from being sent rolling away, his refined energy that was eye-catchingly more abundant than Aldrin's exploded from the Training Metadome.
After receiving one clean hit, the guest Energy Refiner went all out against him.
Is that fair?
Perhaps.
Absurd as it was, Aldrin had no other choice but to quickly switch into a defensive stance. His attacks weren't connecting anymore and his speed was surpassed by his opponent.
Looking back at his accumulated experience in the lower dimension against the human-sized insects, Aldrin found out that he's nowhere near an expert yet.