I have a number of cherry tomato plants in containers. A couple of days back the main branches of one of them bent as if falling and breaking. Since they are resting on raised bricks they did not break perhaps. I have marked in black the bent in the first picture. The second picture is that of another cherry tomato which is standing upright and this bent one was similar to the second one two days back.

Has this happened because of weight of the branches? Or is it something else?

Just to let you know that all my tomato plants have been infested with a little bit of flying aphids and which I am treating with neem oil.

Here is a link that might be useful: Pictures