SCP-106, also commonly known as "The Old Man", is a SCP that move through doors and gates. (refering to the abilities of SCP-106 of SCP:Secret Laboratory). He is able to put down one portal anywhere he stands and can return to that position whenever he desires. His attack will damage you and put you into his pocket dimension, where you need to be lucky to find a way out. This sounds intimidating, but he has some huge flaws:

• He is slow...
  
• He has a delay on his attack, which means that you can simply outmaneuver him.
  
• He has no clue who enters his chamber, or if it is open until checking it.
  
• His biggest weakness is that he can be instant killed (more like contained). We will be using this for our advantage.

You have to be a team of at least two. One of you is going to be the lure. You may rock, paper, scissor this out in the elevator. If you both are fast, you can take him down, before he can reach SCP-914, where he will cause panic and casualties of personnel.

Containing SCP-106 in five steps:

• Spawn. LMAO
  
• Proceed to Entrance Zone. (You will be doing this nonetheless... dunno why i mention it.)
  
• IMPORTANT: Search all lockers for a facility manager card (Tier 4). It's a red card.
  
• Proceed to Heavy Containment.
  
• Find SCP-106 containment chamber and sacrifice the loser of the rock paper scissor battle.

Enjoy the screams of agony that mark your victory over that anomalous entity known as the old man.

You actually will have better things to do... like... escaping the facility.
If you manage to get a 05-Card though, be so kind and open the doors of SCP-106s chamber.
T H A N K Y O U (｡◕‿◕｡)

This may be pretty rare scenario, but I saw this a few times as a spectator...

When a human sacrifices his self, and there is no one left to press the button, DO NOT PRESS THE 🅱️UTTON OF SCP-106 CONTAINMENT CHAMBER.

This is considered a duck move.