Glolov lost his composure.
But, standing from Glolov's perspective, especially considering the experiences he's had over most of his life, you'll find that not bursting into tears was already extremely restrained.
Why?
Let's not use Glolov as an example, let's take Fart Fire, who already died in battle.
In Central Africa, food is actually easy to obtain, so when Glolov and Fart Fire were trapped in battle, they survived on wild fruits and raw meat, though they had severe diarrhea and farted a lot. Fart Fire played a trick and nearly lost his life, earning the nickname Fart Fire.
