God's fork bomb

have you heard about the ackermann function that increase so fast, that the universe could explode?

def ackermann(m, n):
    if m == 0:
        return n + 1
    elif n == 0:
        return ackermann(m - 1, 1)
    else:
        return ackermann(m - 1, ackermann(m, n - 1))

print(ackermann(0, 5))  # 6
print(ackermann(1, 2))  # 4
print(ackermann(2, 2))  # 7
print(ackermann(3, 3))  # 61
print(ackermann(4, 2)) # 2^65536 - 3
print(ackermann(5, 1)) # PEI
...